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

R=lcwu@chromium.org,byungchul@chromium.org
BUG=internal b/19004169

Review URL: https://codereview.chromium.org/917063003

Cr-Commit-Position: refs/heads/master@{#316886}

1 files changed, 12 insertions, 2 deletions

diff --git a/chromecast/browser/cast_content_browser_client.h b/chromecast/browser/cast_content_browser_client.h
index 31d0eeb..fd84b72 100644
--- a/chromecast/browser/cast_content_browser_client.h
+++ b/chromecast/browser/cast_content_browser_client.h
@@ -15,19 +15,29 @@ 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;