Chromecast: add platform hooks to inject browser/renderer message filters.

chromecast/browser/cast_content_browser_client.h

 // 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.
 
 #ifndef CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/content_browser_client.h"
 
 namespace breakpad {
 class CrashHandlerHostLinux;
 }
 
+namespace content {
+class BrowserMessageFilter;
+}
+
 namespace chromecast {
 namespace shell {
 
 class CastBrowserMainParts;
 class URLRequestContextFactory;
 
-void PlatformAppendExtraCommandLineSwitches(base::CommandLine* command_line);
-
 class CastContentBrowserClient: public content::ContentBrowserClient {
  public:
   CastContentBrowserClient();
   ~CastContentBrowserClient() override;
 
+  // Appends extra command line arguments before launching a new process.
+  void PlatformAppendExtraCommandLineSwitches(base::CommandLine* command_line);
+
+  // Returns any BrowserMessageFilters from the platform implementation that
+  // should be added when launching a new render process.
+  std::vector<scoped_refptr<content::BrowserMessageFilter>>
+  PlatformGetBrowserMessageFilters();
+
   // content::ContentBrowserClient implementation:
   content::BrowserMainParts* CreateBrowserMainParts(
       const content::MainFunctionParams& parameters) override;
   void RenderProcessWillLaunch(content::RenderProcessHost* host) override;
   net::URLRequestContextGetter* CreateRequestContext(
       content::BrowserContext* browser_context,
       content::ProtocolHandlerMap* protocol_handlers,
       content::URLRequestInterceptorScopedVector request_interceptors)
       override;
   bool IsHandledURL(const GURL& url) override;
@@ skipping 66 matching lines @@
 
   scoped_ptr<URLRequestContextFactory> url_request_context_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentBrowserClient);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_BROWSER_CLIENT_H_