diff --git a/brightray/browser/inspectable_web_contents.h b/brightray/browser/inspectable_web_contents.h
index edf26ed117d..01e9c6d2741 100644
--- a/brightray/browser/inspectable_web_contents.h
+++ b/brightray/browser/inspectable_web_contents.h
@@ -34,7 +34,7 @@ class InspectableWebContents {
   virtual void SetDelegate(InspectableWebContentsDelegate* delegate) = 0;
   virtual InspectableWebContentsDelegate* GetDelegate() const = 0;
 
-  virtual void SetCanDock(bool can_dock) = 0;
+  virtual void SetDockState(const std::string& state) = 0;
   virtual void ShowDevTools() = 0;
   virtual void CloseDevTools() = 0;
   virtual bool IsDevToolsViewShowing() = 0;
diff --git a/brightray/browser/inspectable_web_contents_impl.cc b/brightray/browser/inspectable_web_contents_impl.cc
index 64544058951..819bdba93a5 100644
--- a/brightray/browser/inspectable_web_contents_impl.cc
+++ b/brightray/browser/inspectable_web_contents_impl.cc
@@ -116,6 +116,18 @@ GURL GetRemoteBaseURL() {
       content::GetWebKitRevision().c_str()));
 }
 
+GURL GetDevToolsURL(
+    bool can_dock,
+    const std::string& dock_state) {
+  auto url_string =
+      base::StringPrintf(kChromeUIDevToolsURL,
+                         GetRemoteBaseURL().spec().c_str(),
+                         can_dock ? "true" : "");
+  if (!dock_state.empty())
+    url_string += "&settings={\"currentDockState\":\"\\\"" + dock_state + "\\\"\"}&";
+  return GURL(url_string);
+}
+
 // ResponseWriter -------------------------------------------------------------
 
 class ResponseWriter : public net::URLFetcherResponseWriter {
@@ -234,8 +246,13 @@ InspectableWebContentsDelegate* InspectableWebContentsImpl::GetDelegate() const
   return delegate_;
 }
 
-void InspectableWebContentsImpl::SetCanDock(bool can_dock) {
-  can_dock_ = can_dock;
+void InspectableWebContentsImpl::SetDockState(const std::string& state) {
+  if (state == "detach") {
+    can_dock_ = false;
+  } else {
+    can_dock_ = true;
+    dock_state_ = state;
+  }
 }
 
 void InspectableWebContentsImpl::ShowDevTools() {
@@ -254,11 +271,8 @@ void InspectableWebContentsImpl::ShowDevTools() {
     agent_host_ = content::DevToolsAgentHost::GetOrCreateFor(web_contents_.get());
     agent_host_->AttachClient(this);
 
-    GURL devtools_url(base::StringPrintf(kChromeUIDevToolsURL,
-                                         GetRemoteBaseURL().spec().c_str(),
-                                         can_dock_ ? "true" : ""));
     devtools_web_contents_->GetController().LoadURL(
-        devtools_url,
+        GetDevToolsURL(can_dock_, dock_state_),
         content::Referrer(),
         ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
         std::string());
diff --git a/brightray/browser/inspectable_web_contents_impl.h b/brightray/browser/inspectable_web_contents_impl.h
index 518fc853cb1..b6e91a7d0f5 100644
--- a/brightray/browser/inspectable_web_contents_impl.h
+++ b/brightray/browser/inspectable_web_contents_impl.h
@@ -50,7 +50,7 @@ class InspectableWebContentsImpl :
 
   void SetDelegate(InspectableWebContentsDelegate* delegate) override;
   InspectableWebContentsDelegate* GetDelegate() const override;
-  void SetCanDock(bool can_dock) override;
+  void SetDockState(const std::string& state) override;
   void ShowDevTools() override;
   void CloseDevTools() override;
   bool IsDevToolsViewShowing() override;
@@ -168,12 +168,13 @@ class InspectableWebContentsImpl :
   DevToolsContentsResizingStrategy contents_resizing_strategy_;
   gfx::Rect devtools_bounds_;
   bool can_dock_;
+  std::string dock_state_;
 
   using PendingRequestsMap = std::map<const net::URLFetcher*, DispatchCallback>;
   PendingRequestsMap pending_requests_;
   InspectableWebContentsDelegate* delegate_;  // weak references.
 
-  PrefService* pref_service_; // weak reference.
+  PrefService* pref_service_;  // weak reference.
 
   scoped_ptr<content::WebContents> web_contents_;
   scoped_ptr<content::WebContents> devtools_web_contents_;