[NotLanded] Implement the fetching algorithm of the Web Manifest.

Source/web/WebRemoteFrameImpl.h

 // 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.
 
 #ifndef WebRemoteFrameImpl_h
 #define WebRemoteFrameImpl_h
 
 #include "public/web/WebRemoteFrame.h"
 #include "web/RemoteFrameClient.h"
 #include "wtf/RefCounted.h"
@@ skipping 152 matching lines @@
 
     virtual WebString contentAsText(size_t maxChars) const OVERRIDE;
     virtual WebString contentAsMarkup() const OVERRIDE;
     virtual WebString renderTreeAsText(RenderAsTextControls toShow = RenderAsTextNormal) const OVERRIDE;
     virtual WebString markerTextForListItem(const WebElement&) const OVERRIDE;
     virtual WebRect selectionBoundsRect() const OVERRIDE;
 
     virtual bool selectionStartHasSpellingMarkerFor(int from, int length) const OVERRIDE;
     virtual WebString layerTreeAsText(bool showDebugInfo = false) const OVERRIDE;
 
+    virtual void requestManifest(WebManifestRequest&) const OVERRIDE;
+
     WebCore::RemoteFrame* frame() const { return m_frame.get(); }
 
 private:
     RemoteFrameClient m_frameClient;
     RefPtr<WebCore::RemoteFrame> m_frame;
 };
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl, WebFrame, frame, frame->isWebRemoteFrame(), frame.isWebRemoteFrame());
 
 
 } // namespace blink
 
 #endif // WebRemoteFrameImpl_h