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 5330389e3c53598ebd5ba5f7a880050edd72f1bc..f60828dfe4a9687babe338db4408dbc1bf72a92f 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -2427,6 +2427,28 @@ void WebContentsImpl::RouteCloseEvent(RenderViewHost* rvh) {
     GetRenderViewHost()->ClosePage();
 }
 
+bool WebContentsImpl::ShouldIgnoreNavigation(
+    RenderViewHost* render_view_host,
+    const GURL& url,
+    const content::Referrer& referrer,
+    bool is_content_initiated) {
+  if (!delegate_)
+    return false;
+
+  GURL validated_url(url);
+  RenderViewHostImpl* render_view_host_impl =
+      static_cast<RenderViewHostImpl*>(render_view_host);
+  content::RenderProcessHost* render_process_host =
+      render_view_host->GetProcess();
+  render_view_host_impl->FilterURL(
+      ChildProcessSecurityPolicyImpl::GetInstance(),
+      render_process_host->GetID(),
+      false,
+      &validated_url);
+  return delegate_->ShouldIgnoreNavigation(
+      this, validated_url, referrer, is_content_initiated);
+}
+
 void WebContentsImpl::RunJavaScriptMessage(
     RenderViewHost* rvh,
     const string16& message,