[Android] Use resource throttle instead of HandleExternalProtocol.

content/public/browser/resource_dispatcher_host_delegate.h

Index: content/public/browser/resource_dispatcher_host_delegate.h
diff --git a/content/public/browser/resource_dispatcher_host_delegate.h b/content/public/browser/resource_dispatcher_host_delegate.h
index 81b7209a3acb5975bb25abe64ad37c1d9a2ee64b..ed0688f5245efc9d300b85c0eedd3814c185c60d 100644
--- a/content/public/browser/resource_dispatcher_host_delegate.h
+++ b/content/public/browser/resource_dispatcher_host_delegate.h
@@ -95,8 +95,9 @@ class CONTENT_EXPORT ResourceDispatcherHostDelegate {
   virtual ResourceDispatcherHostLoginDelegate* CreateLoginDelegate(
       net::AuthChallengeInfo* auth_info, net::URLRequest* request);
 
-  // Launches the url for the given tab.
-  virtual void HandleExternalProtocol(const GURL& url,
+  // Launches the url for the given tab. Returns true if the request was
+  // handled.

[joth, 2012/10/24 18:47:55]

maybe expand this to note true only implies an attempt was made to handle the
URL e.g. by starting some app. it does not guarantee that app successfully
handled it.

[John Knottenbelt, 2012/10/25 16:17:27]

Done.

+  virtual bool HandleExternalProtocol(const GURL& url,
                                       int child_id,
                                       int route_id);