Chromecast: move link-time decisions to inheritance-based Content*Client.

chromecast/browser/cast_content_browser_client.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 "chromecast/browser/cast_content_browser_client.h"
 
 #include <string>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
@@ skipping 47 matching lines @@
       url_request_context_factory_(new URLRequestContextFactory()) {
 }
 
 CastContentBrowserClient::~CastContentBrowserClient() {
   content::BrowserThread::DeleteSoon(
       content::BrowserThread::IO,
       FROM_HERE,
       url_request_context_factory_.release());
 }
 
+void CastContentBrowserClient::AppendExtraCommandLineSwitches(
+    base::CommandLine* command_line) {
+}
+
+std::vector<scoped_refptr<content::BrowserMessageFilter>>
+CastContentBrowserClient::GetBrowserMessageFilters() {
+  return std::vector<scoped_refptr<content::BrowserMessageFilter>>();
+}
+
+scoped_ptr<::media::AudioManagerFactory>
+CastContentBrowserClient::CreateAudioManagerFactory() {
+  // Return nullptr. The factory will not be set, and the statically linked
+  // implementation of AudioManager will be used.
+  return scoped_ptr<::media::AudioManagerFactory>();
+}
+
+#if !defined(OS_ANDROID)
+scoped_ptr<media::MediaPipelineDevice>
+CastContentBrowserClient::CreateMediaPipelineDevice(
+    const media::MediaPipelineDeviceParams& params) {
+  return media::CreateMediaPipelineDevice(params);
+}
+#endif
+
 content::BrowserMainParts* CastContentBrowserClient::CreateBrowserMainParts(
     const content::MainFunctionParams& parameters) {
   return new CastBrowserMainParts(parameters,
                                   url_request_context_factory_.get(),
-                                  PlatformCreateAudioManagerFactory());
+                                  CreateAudioManagerFactory());
 }
 
 void CastContentBrowserClient::RenderProcessWillLaunch(
     content::RenderProcessHost* host) {
 #if !defined(OS_ANDROID)
   scoped_refptr<media::CmaMessageFilterHost> cma_message_filter(
       new media::CmaMessageFilterHost(
           host->GetID(),
           base::Bind(
-              &CastContentBrowserClient::PlatformCreateMediaPipelineDevice,
+              &CastContentBrowserClient::CreateMediaPipelineDevice,
               base::Unretained(this))));
   host->AddFilter(cma_message_filter.get());
 #endif  // !defined(OS_ANDROID)
 
   // Forcibly trigger I/O-thread URLRequestContext initialization before
   // getting HostResolver.
   content::BrowserThread::PostTaskAndReplyWithResult(
       content::BrowserThread::IO, FROM_HERE,
       base::Bind(&net::URLRequestContextGetter::GetURLRequestContext,
                  base::Unretained(
                     url_request_context_factory_->GetSystemGetter())),
       base::Bind(&CastContentBrowserClient::AddNetworkHintsMessageFilter,
                  base::Unretained(this), host->GetID()));
 
-  auto extra_filters = PlatformGetBrowserMessageFilters();
+  auto extra_filters = GetBrowserMessageFilters();
   for (auto const& filter : extra_filters) {
     host->AddFilter(filter.get());
   }
 }
 
 void CastContentBrowserClient::AddNetworkHintsMessageFilter(
     int render_process_id, net::URLRequestContext* context) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   content::RenderProcessHost* host =
@@ skipping 84 matching lines @@
 
 #if defined(OS_LINUX)
   // Necessary for accelerated 2d canvas.  By default on Linux, Chromium assumes
   // GLES2 contexts can be lost to a power-save mode, which breaks GPU canvas
   // apps.
   if (process_type == switches::kGpuProcess) {
     command_line->AppendSwitch(switches::kGpuNoContextLost);
   }
 #endif
 
-  PlatformAppendExtraCommandLineSwitches(command_line);
+  AppendExtraCommandLineSwitches(command_line);
 }
 
 content::AccessTokenStore* CastContentBrowserClient::CreateAccessTokenStore() {
   return new CastAccessTokenStore(
       CastBrowserProcess::GetInstance()->browser_context());
 }
 
 void CastContentBrowserClient::OverrideWebkitPrefs(
     content::RenderViewHost* render_view_host,
     content::WebPreferences* prefs) {
@@ skipping 215 matching lines @@
         process_type, dumps_path, false /* upload */);
   // StartUploaderThread() even though upload is diferred.
   // Breakpad-related memory is freed in the uploader thread.
   crash_handler->StartUploaderThread();
   return crash_handler;
 }
 #endif  // !defined(OS_ANDROID)
 
 }  // namespace shell
 }  // namespace chromecast