Detect <link rel='manifest'> and notify embedder.

Source/web/WebRemoteFrameImpl.cpp

 // Copyright 2014 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 "config.h"
 #include "web/WebRemoteFrameImpl.h"
 
 #include "public/platform/WebFloatRect.h"
 #include "public/platform/WebRect.h"
 #include "public/web/WebDocument.h"
@@ skipping 225 matching lines @@
     ASSERT_NOT_REACHED();
     return WebDocument();
 }
 
 WebPerformance WebRemoteFrameImpl::performance() const
 {
     ASSERT_NOT_REACHED();
     return WebPerformance();
 }
 
+WebURL WebRemoteFrameImpl::manifestURL() const
+{
+    ASSERT_NOT_REACHED();
+    return WebURL();
+}
+
 bool WebRemoteFrameImpl::dispatchBeforeUnloadEvent()
 {
     ASSERT_NOT_REACHED();
     return false;
 }
 
 void WebRemoteFrameImpl::dispatchUnloadEvent()
 {
     ASSERT_NOT_REACHED();
 }
@@ skipping 507 matching lines @@
 }
 
 WebString WebRemoteFrameImpl::layerTreeAsText(bool showDebugInfo) const
 {
     ASSERT_NOT_REACHED();
     return WebString();
 }
 
 } // namespace blink