Navigation transitions: Block first response until after transitions have run.

content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
 
 /**
@@ skipping 22 matching lines @@
 
     /**
      * Called when the a page finishes loading.
      * @param url The validated url for the page.
      */
     @CalledByNative
     public void didStopLoading(String url) {
     }
 
     /**
+     * Called when the page defers navigation immediately after receiving response headers.
+     */
+    @CalledByNative
+    public void didDeferAfterResponseStarted() {
+    }
+
+    /**
      * Called when an error occurs while loading a page and/or the page fails to load.
      * @param errorCode Error code for the occurring error.
      * @param description The description for the error.
      * @param failingUrl The url that was loading when the error occurred.
      */
     @CalledByNative
     public void didFailLoad(boolean isProvisionalLoad,
             boolean isMainFrame, int errorCode, String description, String failingUrl) {
     }
 
@@ skipping 107 matching lines @@
     public void detachFromWebContents() {
         if (mNativeWebContentsObserverAndroid != 0) {
             nativeDestroy(mNativeWebContentsObserverAndroid);
             mNativeWebContentsObserverAndroid = 0;
         }
     }
 
     private native long nativeInit(long contentViewCorePtr);
     private native void nativeDestroy(long nativeWebContentsObserverAndroid);
 }