Pass result of blockage across content API when new tab blocked.

chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/component/web_contents_delegate_android/web_contents_delegate_android.h"
 
 #include <android/keycodes.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
@@ skipping 115 matching lines @@
       content::INVALIDATE_TYPE_TAB | content::INVALIDATE_TYPE_TITLE)) {
     JNIEnv* env = AttachCurrentThread();
     ScopedJavaLocalRef<jobject> obj = GetJavaDelegate(env);
     if (obj.is_null())
       return;
     Java_WebContentsDelegateAndroid_onTabHeaderStateChanged(
         env, obj.obj());
   }
 }
 
-void WebContentsDelegateAndroid::AddNewContents(
+bool WebContentsDelegateAndroid::AddNewContents(
     WebContents* source,
     WebContents* new_contents,
     WindowOpenDisposition disposition,
     const gfx::Rect& initial_pos,
     bool user_gesture) {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> obj = GetJavaDelegate(env);
   bool handled = false;
   if (!obj.is_null()) {
     handled = Java_WebContentsDelegateAndroid_addNewContents(
         env,
         obj.obj(),
         reinterpret_cast<jint>(source),
         reinterpret_cast<jint>(new_contents),
         static_cast<jint>(disposition),
         NULL,
         user_gesture);
   }
   if (!handled)
     delete new_contents;
+  return true;
 }
 
 void WebContentsDelegateAndroid::ActivateContents(WebContents* contents) {
   // TODO(dtrainor) When doing the merge I came across this.  Should we be
   // activating this tab here?
 }
 
 void WebContentsDelegateAndroid::DeactivateContents(WebContents* contents) {
   // Do nothing.
 }
@@ skipping 181 matching lines @@
 
 bool RegisterWebContentsDelegateAndroid(JNIEnv* env) {
   if (!HasClass(env, kWebContentsDelegateAndroidClassPath)) {
     DLOG(ERROR) << "Unable to find class WebContentsDelegateAndroid!";
     return false;
   }
   return RegisterNativesImpl(env);
 }
 
 }  // namespace web_contents_delegate_android