Implement a ResourceThrottle for URL overriding in Chrome on Android.

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 2713 matching lines @@
     }
   }
 
   // In most cases, we receive this from a swapped out RenderViewHost.
   // It is possible to receive it from one that has just been swapped in,
   // in which case we might as well deliver the message anyway.
   GetRenderViewHost()->Send(new ViewMsg_PostMessageEvent(
       GetRenderViewHost()->GetRoutingID(), new_params));
 }
 
+bool WebContentsImpl::ShouldIgnoreNavigation(

[darin (slow to review), 2012/05/31 21:13:39]

I'm trying to understand why the embedder of a WebContents would call a function
on WebContents that is just going to turn around and call a function back on the
embedder via WebContentsDelegate.  It seems like the embedder could just talk
directly to himself instead of going this round-about way.  The only difference
is that in this path FilterURL is called.  Perhaps you should just expose
FilterURL as a content API?

[mkosiba (inactive), 2012/06/01 20:35:12]

Done. The main reason for this code is the FilterURL call. In the previous
version of my patch the 'entry point' for this code was on the
RenderViewHostDelegate, but that got recently moved out of public/browser so I
made the simplest fix to have it work again.

+    const GURL& url,
+    const content::Referrer& referrer,
+    bool is_content_initiated) {
+  if (!delegate_)
+    return false;
+
+  GURL validated_url(url);
+  RenderViewHostImpl* render_view_host_impl = GetRenderViewHostImpl();
+  if (!render_view_host_impl)
+    return false;
+  render_view_host_impl->FilterURL(

[darin (slow to review), 2012/05/31 21:13:39]

nit: FilterURL is a static function so you don't need a RenderViewHostImpl
instance to call it!!

[mkosiba (inactive), 2012/06/01 20:35:12]

Done.

+      ChildProcessSecurityPolicyImpl::GetInstance(),
+      render_view_host_impl->GetProcess()->GetID(),
+      false,
+      &validated_url);
+  return delegate_->ShouldIgnoreNavigation(
+      this, validated_url, referrer, is_content_initiated);
+}
+
 void WebContentsImpl::RunJavaScriptMessage(
     RenderViewHost* rvh,
     const string16& message,
     const string16& default_prompt,
     const GURL& frame_url,
     content::JavaScriptMessageType javascript_message_type,
     IPC::Message* reply_msg,
     bool* did_suppress_message) {
   // Suppress JavaScript dialogs when requested. Also suppress messages when
   // showing an interstitial as it's shown over the previous page and we don't
@@ skipping 323 matching lines @@
       browser_plugin_host()->embedder_render_process_host();
   *embedder_container_id = browser_plugin_host()->instance_id();
   int embedder_process_id =
       embedder_render_process_host ? embedder_render_process_host->GetID() : -1;
   if (embedder_process_id != -1) {
     *embedder_channel_name =
         StringPrintf("%d.r%d", render_view_host->GetProcess()->GetID(),
                      embedder_process_id);
   }
 }