Use a resource throttle to implement shouldOverrideUrlLoading.

android_webview/browser/aw_content_browser_client.cc

Index: android_webview/browser/aw_content_browser_client.cc
diff --git a/android_webview/browser/aw_content_browser_client.cc b/android_webview/browser/aw_content_browser_client.cc
index 1c4d632809046c9076e1376f1f5da88316c23bb1..134f66e53fa0211f5eaab4fec6783cbbfc081d51 100644
--- a/android_webview/browser/aw_content_browser_client.cc
+++ b/android_webview/browser/aw_content_browser_client.cc
@@ -57,9 +57,6 @@ public:
                                 BrowserThread::ID* thread) override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
-  void OnShouldOverrideUrlLoading(int routing_id,
-                                  const base::string16& url,
-                                  bool* ignore_navigation);
   void OnSubFrameCreated(int parent_render_frame_id, int child_render_frame_id);
 
 private:
@@ -80,38 +77,17 @@ AwContentsMessageFilter::~AwContentsMessageFilter() {
 
 void AwContentsMessageFilter::OverrideThreadForMessage(

[sgurun-gerrit only, 2015/07/08 01:08:54]

nit:remove empty method.

[gsennton, 2015/07/08 11:12:55]

Done.

     const IPC::Message& message, BrowserThread::ID* thread) {
-  if (message.type() == AwViewHostMsg_ShouldOverrideUrlLoading::ID) {
-    *thread = BrowserThread::UI;
-  }
 }
 
 bool AwContentsMessageFilter::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(AwContentsMessageFilter, message)
-    IPC_MESSAGE_HANDLER(AwViewHostMsg_ShouldOverrideUrlLoading,
-                        OnShouldOverrideUrlLoading)
     IPC_MESSAGE_HANDLER(AwViewHostMsg_SubFrameCreated, OnSubFrameCreated)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
-void AwContentsMessageFilter::OnShouldOverrideUrlLoading(
-    int render_frame_id,
-    const base::string16& url,
-    bool* ignore_navigation) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  *ignore_navigation = false;
-  AwContentsClientBridgeBase* client =
-      AwContentsClientBridgeBase::FromID(process_id_, render_frame_id);
-  if (client) {
-    *ignore_navigation = client->ShouldOverrideUrlLoading(url);
-  } else {
-    LOG(WARNING) << "Failed to find the associated render view host for url: "
-                 << url;
-  }
-}
-
 void AwContentsMessageFilter::OnSubFrameCreated(int parent_render_frame_id,
                                                 int child_render_frame_id) {
   AwContentsIoThreadClient::SubFrameCreated(