diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index 0a9e6c3ad6fe..67af2022dbc8 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -457,6 +457,15 @@ void WebContents::RequestMediaAccessPermission(
   permission_helper->RequestMediaAccessPermission(request, callback);
 }
 
+void WebContents::RequestToLockMouse(
+    content::WebContents* web_contents,
+    bool user_gesture,
+    bool last_unlocked_by_target) {
+  auto permission_helper =
+      WebContentsPermissionHelper::FromWebContents(web_contents);
+  permission_helper->RequestPointerLockPermission(user_gesture);
+}
+
 void WebContents::BeforeUnloadFired(const base::TimeTicks& proceed_time) {
   // Do nothing, we override this method just to avoid compilation error since
   // there are two virtual functions named BeforeUnloadFired.
diff --git a/atom/browser/api/atom_api_web_contents.h b/atom/browser/api/atom_api_web_contents.h
index 6587759efb9f..cd6d0e7b6083 100644
--- a/atom/browser/api/atom_api_web_contents.h
+++ b/atom/browser/api/atom_api_web_contents.h
@@ -199,6 +199,10 @@ class WebContents : public mate::TrackableObject<WebContents>,
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) override;
+  void RequestToLockMouse(
+      content::WebContents* web_contents,
+      bool user_gesture,
+      bool last_unlocked_by_target) override;
 
   // content::WebContentsObserver:
   void BeforeUnloadFired(const base::TimeTicks& proceed_time) override;
diff --git a/atom/browser/atom_permission_manager.cc b/atom/browser/atom_permission_manager.cc
index c245a278c3b2..e7fdaaffea71 100644
--- a/atom/browser/atom_permission_manager.cc
+++ b/atom/browser/atom_permission_manager.cc
@@ -8,10 +8,28 @@
 #include "content/public/browser/permission_type.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 
 namespace atom {
 
+namespace {
+
+// Must be kept in sync with atom_browser_client.cc
+int kDefaultRoutingID = 2;
+
+bool WebContentsDestroyed(int process_id) {
+  auto rvh = content::RenderViewHost::FromID(process_id, kDefaultRoutingID);
+  if (rvh) {
+    auto contents = content::WebContents::FromRenderViewHost(rvh);
+    return contents->IsBeingDestroyed();
+  }
+
+  return true;
+}
+
+}  // namespace
+
 AtomPermissionManager::AtomPermissionManager()
     : request_id_(0) {
 }
@@ -22,8 +40,10 @@ AtomPermissionManager::~AtomPermissionManager() {
 void AtomPermissionManager::SetPermissionRequestHandler(
     const RequestHandler& handler) {
   if (handler.is_null() && !pending_requests_.empty()) {
-    for (const auto& request : pending_requests_)
-      request.second.Run(content::PERMISSION_STATUS_DENIED);
+    for (const auto& request : pending_requests_) {
+      if (!WebContentsDestroyed(request.second.render_process_id))
+        request.second.callback.Run(content::PERMISSION_STATUS_DENIED);
+    }
     pending_requests_.clear();
   }
   request_handler_ = handler;
@@ -35,9 +55,11 @@ int AtomPermissionManager::RequestPermission(
     const GURL& requesting_origin,
     bool user_gesture,
     const ResponseCallback& response_callback) {
+  int process_id = render_frame_host->GetProcess()->GetID();
+
   if (permission == content::PermissionType::MIDI_SYSEX) {
     content::ChildProcessSecurityPolicy::GetInstance()->
-        GrantSendMidiSysExMessage(render_frame_host->GetProcess()->GetID());
+        GrantSendMidiSysExMessage(process_id);
   }
 
   if (!request_handler_.is_null()) {
@@ -49,7 +71,7 @@ int AtomPermissionManager::RequestPermission(
                                request_id_,
                                requesting_origin,
                                response_callback);
-    pending_requests_[request_id_] = callback;
+    pending_requests_[request_id_] = { process_id, callback };
     request_handler_.Run(web_contents, permission, callback);
     return request_id_;
   }
@@ -63,14 +85,19 @@ void AtomPermissionManager::OnPermissionResponse(
     const GURL& origin,
     const ResponseCallback& callback,
     content::PermissionStatus status) {
-  callback.Run(status);
-  pending_requests_.erase(request_id);
+  auto request = pending_requests_.find(request_id);
+  if (request != pending_requests_.end()) {
+    if (!WebContentsDestroyed(request->second.render_process_id))
+      callback.Run(status);
+    pending_requests_.erase(request);
+  }
 }
 
 void AtomPermissionManager::CancelPermissionRequest(int request_id) {
   auto request = pending_requests_.find(request_id);
   if (request != pending_requests_.end()) {
-    request->second.Run(content::PERMISSION_STATUS_DENIED);
+    if (!WebContentsDestroyed(request->second.render_process_id))
+      request->second.callback.Run(content::PERMISSION_STATUS_DENIED);
     pending_requests_.erase(request);
   }
 }
diff --git a/atom/browser/atom_permission_manager.h b/atom/browser/atom_permission_manager.h
index 8d8729acc66f..4bebbbc84f29 100644
--- a/atom/browser/atom_permission_manager.h
+++ b/atom/browser/atom_permission_manager.h
@@ -65,9 +65,14 @@ class AtomPermissionManager : public content::PermissionManager {
   void UnsubscribePermissionStatusChange(int subscription_id) override;
 
  private:
+  struct RequestInfo {
+    int render_process_id;
+    ResponseCallback callback;
+  };
+
   RequestHandler request_handler_;
 
-  std::map<int, ResponseCallback> pending_requests_;
+  std::map<int, RequestInfo> pending_requests_;
 
   int request_id_;
 
diff --git a/atom/browser/web_contents_permission_helper.cc b/atom/browser/web_contents_permission_helper.cc
index da2ad57ad979..6b017aa1342e 100644
--- a/atom/browser/web_contents_permission_helper.cc
+++ b/atom/browser/web_contents_permission_helper.cc
@@ -66,6 +66,11 @@ void MediaAccessAllowed(
   callback.Run(devices, result, scoped_ptr<content::MediaStreamUI>());
 }
 
+void OnPointerLockResponse(content::WebContents* web_contents, bool allowed) {
+  if (web_contents)
+    web_contents->GotResponseToLockMouseRequest(allowed);
+}
+
 void OnPermissionResponse(const base::Callback<void(bool)>& callback,
                           content::PermissionStatus status) {
   if (status == content::PERMISSION_STATUS_GRANTED)
@@ -86,12 +91,12 @@ WebContentsPermissionHelper::~WebContentsPermissionHelper() {
 
 void WebContentsPermissionHelper::RequestPermission(
     content::PermissionType permission,
-    const base::Callback<void(bool)>& callback) {
+    const base::Callback<void(bool)>& callback,
+    bool user_gesture) {
   auto rfh = web_contents_->GetMainFrame();
   auto permission_manager = static_cast<AtomPermissionManager*>(
       web_contents_->GetBrowserContext()->GetPermissionManager());
   auto origin = web_contents_->GetLastCommittedURL();
-  bool user_gesture = false;
   permission_manager->RequestPermission(
       permission, rfh, origin, user_gesture,
       base::Bind(&OnPermissionResponse, callback));
@@ -111,4 +116,11 @@ void WebContentsPermissionHelper::RequestWebNotificationPermission(
   RequestPermission(content::PermissionType::NOTIFICATIONS, callback);
 }
 
+void WebContentsPermissionHelper::RequestPointerLockPermission(
+    bool user_gesture) {
+  RequestPermission((content::PermissionType)(PermissionType::POINTER_LOCK),
+                    base::Bind(&OnPointerLockResponse, web_contents_),
+                    user_gesture);
+}
+
 }  // namespace atom
diff --git a/atom/browser/web_contents_permission_helper.h b/atom/browser/web_contents_permission_helper.h
index 6bd2bb2559e5..68682340ceb6 100644
--- a/atom/browser/web_contents_permission_helper.h
+++ b/atom/browser/web_contents_permission_helper.h
@@ -17,11 +17,17 @@ class WebContentsPermissionHelper
  public:
   ~WebContentsPermissionHelper() override;
 
+  enum class PermissionType {
+    POINTER_LOCK = static_cast<int>(content::PermissionType::NUM) + 1,
+    FULLSCREEN
+  };
+
   void RequestMediaAccessPermission(
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback);
   void RequestWebNotificationPermission(
       const base::Callback<void(bool)>& callback);
+  void RequestPointerLockPermission(bool user_gesture);
 
  private:
   explicit WebContentsPermissionHelper(content::WebContents* web_contents);
@@ -29,7 +35,8 @@ class WebContentsPermissionHelper
 
   void RequestPermission(
       content::PermissionType permission,
-      const base::Callback<void(bool)>& callback);
+      const base::Callback<void(bool)>& callback,
+      bool user_gesture = false);
 
   content::WebContents* web_contents_;
 
diff --git a/atom/common/native_mate_converters/content_converter.cc b/atom/common/native_mate_converters/content_converter.cc
index 15066085af09..699f101d0e4b 100644
--- a/atom/common/native_mate_converters/content_converter.cc
+++ b/atom/common/native_mate_converters/content_converter.cc
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "atom/browser/api/atom_api_web_contents.h"
+#include "atom/browser/web_contents_permission_helper.h"
 #include "atom/common/native_mate_converters/callback.h"
 #include "atom/common/native_mate_converters/string16_converter.h"
 #include "content/public/browser/web_contents.h"
@@ -104,16 +105,14 @@ bool Converter<content::PermissionStatus>::FromV8(
     v8::Isolate* isolate,
     v8::Local<v8::Value> val,
     content::PermissionStatus* out) {
-  std::string status;
-  if (!ConvertFromV8(isolate, val, &status))
+  bool result;
+  if (!ConvertFromV8(isolate, val, &result))
     return false;
 
-  if (status == "granted")
+  if (result)
     *out = content::PERMISSION_STATUS_GRANTED;
-  else if (status == "denied" || status.empty())
-    *out = content::PERMISSION_STATUS_DENIED;
   else
-    return false;
+    *out = content::PERMISSION_STATUS_DENIED;
 
   return true;
 }
@@ -121,6 +120,7 @@ bool Converter<content::PermissionStatus>::FromV8(
 // static
 v8::Local<v8::Value> Converter<content::PermissionType>::ToV8(
     v8::Isolate* isolate, const content::PermissionType& val) {
+  using PermissionType = atom::WebContentsPermissionHelper::PermissionType;
   switch (val) {
     case content::PermissionType::MIDI_SYSEX:
       return StringToV8(isolate, "midiSysex");
@@ -137,10 +137,16 @@ v8::Local<v8::Value> Converter<content::PermissionType>::ToV8(
       return StringToV8(isolate, "mediaKeySystem");
     case content::PermissionType::MIDI:
       return StringToV8(isolate, "midi");
-    case content::PermissionType::DURABLE_STORAGE:
     default:
-      return StringToV8(isolate, "unknown");
+      break;
   }
+
+  if (val == (content::PermissionType)(PermissionType::POINTER_LOCK))
+    return StringToV8(isolate, "pointerLock");
+  else if (val == (content::PermissionType)(PermissionType::FULLSCREEN))
+    return StringToV8(isolate, "fullscreen");
+
+  return StringToV8(isolate, "unknown");
 }
 
 // static