Hook PushMessagingMessageFilter up to GCMDriver

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
diff --git a/content/public/browser/content_browser_client.h b/content/public/browser/content_browser_client.h
index d1e3bf56fa0c4e4f158f5ba1e71bc72700578d67..27b78549a81de31b671500fdd27808415c0138f1 100644
--- a/content/public/browser/content_browser_client.h
+++ b/content/public/browser/content_browser_client.h
@@ -93,6 +93,7 @@ class DevToolsManagerDelegate;
 class ExternalVideoSurfaceContainer;
 class LocationProvider;
 class MediaObserver;
+class PushMessagingService;
 class QuotaPermissionContext;
 class RenderFrameHost;
 class RenderProcessHost;
@@ -504,6 +505,13 @@ class CONTENT_EXPORT ContentBrowserClient {
   virtual SpeechRecognitionManagerDelegate*
       GetSpeechRecognitionManagerDelegate();
 
+  // Allows the embedder to provide an implementation of PushMessagingService.
+  // Ownership is not transferred to the caller; instead the caller will assume
+  // the service lifetime exceeds that of RenderProcessHost.
+  // It's valid to return NULL.
+  virtual PushMessagingService* CreatePushMessagingService(
+      BrowserContext* browser_context);
+
   // Getters for common objects.
   virtual net::NetLog* GetNetLog();