Only allow webrtc HW offload for H264 encode for extension process.

extensions/renderer/dispatcher.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/dispatcher.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
@@ skipping 165 matching lines @@
 
 }  // namespace
 
 Dispatcher::Dispatcher(DispatcherDelegate* delegate)
     : delegate_(delegate),
       content_watcher_(new ContentWatcher()),
       source_map_(&ResourceBundle::GetSharedInstance()),
       v8_schema_registry_(new V8SchemaRegistry),
       is_webkit_initialized_(false),
       user_script_set_manager_observer_(this) {
-  const CommandLine& command_line = *(CommandLine::ForCurrentProcess());
+  CommandLine& command_line = *(CommandLine::ForCurrentProcess());
   is_extension_process_ =
       command_line.HasSwitch(extensions::switches::kExtensionProcess) ||
       command_line.HasSwitch(::switches::kSingleProcess);
 
   if (is_extension_process_) {
     RenderThread::Get()->SetIdleNotificationDelayInMs(
         kInitialExtensionIdleHandlerDelayMs);
+    command_line.AppendSwitch(::switches::kEnableWebRtcHWH264Encoding);
   }
 
   RenderThread::Get()->RegisterExtension(SafeBuiltins::CreateV8Extension());
 
   user_script_set_manager_.reset(new UserScriptSetManager(&extensions_));
   script_injection_manager_.reset(
       new ScriptInjectionManager(&extensions_, user_script_set_manager_.get()));
   user_script_set_manager_observer_.Add(user_script_set_manager_.get());
   request_sender_.reset(new RequestSender(this));
   PopulateSourceMap();
@@ skipping 1087 matching lines @@
     return v8::Handle<v8::Object>();
 
   if (bind_name)
     *bind_name = split.back();
 
   return bind_object.IsEmpty() ? AsObjectOrEmpty(GetOrCreateChrome(context))
                                : bind_object;
 }
 
 }  // namespace extensions