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 599687097cd9e5c956a3d7b98a82d78bd8ea4cd1..ef3ab7cd988b99c9c9c095426d823aed5bd14d5b 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2728,6 +2728,26 @@ void WebContentsImpl::RouteMessageEvent(
       GetRenderViewHost()->GetRoutingID(), new_params));
 }
 
+bool WebContentsImpl::ShouldIgnoreNavigation(
+    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(
+      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,