set network emulation client id in request headers

atom/browser/api/atom_api_session.cc

@@ -22,6 +22,8 @@
 #include "atom/common/native_mate_converters/file_path_converter.h"
 #include "atom/common/native_mate_converters/net_converter.h"
 #include "atom/common/node_includes.h"
+#include "atom/common/options_switches.h"
+#include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/guid.h"
 #include "base/prefs/pref_service.h"
@@ -286,6 +288,12 @@ void ClearHostResolverCacheInIO(
   }
 }
 
+void SetDevToolsNetworkEmulationClientId(const std::string& id) {
+  auto cmd_line = base::CommandLine::ForCurrentProcess();
+  cmd_line->AppendSwitchASCII(
+      switches::kDevToolsEmulateNetworkConditionsClientId, id);
+}
+
 }  // namespace
 
 Session::Session(AtomBrowserContext* browser_context)
@@ -386,12 +394,14 @@ void Session::EnableNetworkEmulation(const mate::Dictionary& options) {
 
   browser_context_->network_controller_handle()->SetNetworkState(
       devtools_network_emulation_client_id_, std::move(conditions));
+  SetDevToolsNetworkEmulationClientId(devtools_network_emulation_client_id_);
 }
 
 void Session::DisableNetworkEmulation() {
   scoped_ptr<brightray::DevToolsNetworkConditions> conditions;
   browser_context_->network_controller_handle()->SetNetworkState(
       devtools_network_emulation_client_id_, std::move(conditions));
+  SetDevToolsNetworkEmulationClientId(std::string());
 }
 
 void Session::SetCertVerifyProc(v8::Local<v8::Value> val,

atom/browser/net/atom_network_delegate.cc

@@ -8,6 +8,8 @@
 #include <utility>
 
 #include "atom/common/native_mate_converters/net_converter.h"
+#include "atom/common/options_switches.h"
+#include "base/command_line.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "content/public/browser/browser_thread.h"
@@ -241,6 +243,12 @@ int AtomNetworkDelegate::OnBeforeSendHeaders(
     net::URLRequest* request,
     const net::CompletionCallback& callback,
     net::HttpRequestHeaders* headers) {
+  auto cmd_line = base::CommandLine::ForCurrentProcess();
+  auto client_id = cmd_line->GetSwitchValueASCII(
+      switches::kDevToolsEmulateNetworkConditionsClientId);
+  if (!client_id.empty())
+    headers->SetHeader(
+        switches::kDevToolsEmulateNetworkConditionsClientId, client_id);
   if (!ContainsKey(response_listeners_, kOnBeforeSendHeaders))
     return brightray::NetworkDelegate::OnBeforeSendHeaders(
         request, callback, headers);

atom/common/options_switches.cc

@@ -156,6 +156,10 @@ const char kWidevineCdmPath[] = "widevine-cdm-path";
 // Widevine CDM version.
 const char kWidevineCdmVersion[] = "widevine-cdm-version";
 
+// Client id for devtools network emulation.
+const char kDevToolsEmulateNetworkConditionsClientId[] =
+    "X-DevTools-Emulate-Network-Conditions-Client-Id";
+
 }  // namespace switches
 
 }  // namespace atom

atom/common/options_switches.h

@@ -87,6 +87,8 @@ extern const char kOpenerID[];
 extern const char kWidevineCdmPath[];
 extern const char kWidevineCdmVersion[];
 
+extern const char kDevToolsEmulateNetworkConditionsClientId[];
+
 }  // namespace switches
 
 }  // namespace atom