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

chrome/browser/extensions/chrome_content_browser_client_extensions_part.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 "chrome/browser/extensions/chrome_content_browser_client_extensions_part.h"
 
 #include <set>
 
 #include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 11 matching lines @@
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_process_policy.h"
 #include "chrome/common/extensions/manifest_handlers/app_isolation_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/browser_url_handler.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/content_switches.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_message_filter.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/info_map.h"
 #include "extensions/browser/view_type_utils.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/manifest_handlers/background_info.h"
 #include "extensions/common/manifest_handlers/web_accessible_resources_info.h"
 #include "extensions/common/switches.h"
@@ skipping 477 matching lines @@
       Profile::FromBrowserContext(browser_context)));
 }
 
 void ChromeContentBrowserClientExtensionsPart::
     AppendExtraRendererCommandLineSwitches(base::CommandLine* command_line,
                                            content::RenderProcessHost* process,
                                            Profile* profile) {
   if (!process)
     return;
   DCHECK(profile);
-  if (ProcessMap::Get(profile)->Contains(process->GetID()))
+  if (ProcessMap::Get(profile)->Contains(process->GetID())) {
     command_line->AppendSwitch(switches::kExtensionProcess);
+#if defined(ENABLE_WEBRTC)
+    command_line->AppendSwitch(::switches::kEnableWebRtcHWH264Encoding);
+#endif
+  }
 }
 
 }  // namespace extensions