Implement a ResourceThrottle for URL overriding in Chrome on Android.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 5b750370b1e6f518206928094b39445f06ad9478..263b84ce833904fc75e9e11734270a4bc4487921 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2731,6 +2731,26 @@ void WebContentsImpl::RouteMessageEvent(
       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,