Use a resource throttle to implement shouldOverrideUrlLoading.

android_webview/browser/aw_contents_client_bridge_base.h

Index: android_webview/browser/aw_contents_client_bridge_base.h
diff --git a/android_webview/browser/aw_contents_client_bridge_base.h b/android_webview/browser/aw_contents_client_bridge_base.h
index 31c965fae9190e670bc251a26a62e9cd2967f627..9cd92063f0f0cad49ef9b404a050b5efff8d1ccd 100644
--- a/android_webview/browser/aw_contents_client_bridge_base.h
+++ b/android_webview/browser/aw_contents_client_bridge_base.h
@@ -62,10 +62,6 @@ class AwContentsClientBridgeBase {
       const base::string16& message_text,
       const content::JavaScriptDialogManager::DialogClosedCallback& callback)
       = 0;
-
-  virtual bool ShouldOverrideUrlLoading(const base::string16& url,
-                                        bool has_user_gesture,
-                                        bool is_redirect) = 0;
 };
 
 }  // namespace android_webview