Use a resource throttle to implement shouldOverrideUrlLoading.

content/public/renderer/content_renderer_client.cc

Index: content/public/renderer/content_renderer_client.cc
diff --git a/content/public/renderer/content_renderer_client.cc b/content/public/renderer/content_renderer_client.cc
index 7c6957b72adc281bc3a9c4622c5361ed4e22a3e1..95af2f75c95701f9a258115108836b4a04036ff5 100644
--- a/content/public/renderer/content_renderer_client.cc
+++ b/content/public/renderer/content_renderer_client.cc
@@ -101,20 +101,6 @@ bool ContentRendererClient::AllowPopup() {
   return false;
 }
 
-#ifdef OS_ANDROID
-bool ContentRendererClient::HandleNavigation(
-    RenderFrame* render_frame,
-    DocumentState* document_state,
-    int opener_id,
-    blink::WebFrame* frame,
-    const blink::WebURLRequest& request,
-    blink::WebNavigationType type,
-    blink::WebNavigationPolicy default_policy,
-    bool is_redirect) {
-  return false;
-}
-#endif
-
 bool ContentRendererClient::ShouldFork(blink::WebLocalFrame* frame,
                                        const GURL& url,
                                        const std::string& http_method,