[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/HashMap.h"
@@ skipping 155 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;
+
     virtual WebLocalFrame* createLocalChild(const WebString& name, WebFrameClient*) OVERRIDE;
     virtual WebRemoteFrame* createRemoteChild(const WebString& name, WebFrameClient*) OVERRIDE;
 
     void initializeWebCoreFrame(blink::FrameHost*, blink::FrameOwner*, const AtomicString& name);
 
     void setWebCoreFrame(PassRefPtr<blink::RemoteFrame>);
     blink::RemoteFrame* frame() const { return m_frame.get(); }
 
     static WebRemoteFrameImpl* fromFrame(blink::RemoteFrame&);
 
 private:
     RemoteFrameClient m_frameClient;
     RefPtr<blink::RemoteFrame> m_frame;
 
     HashMap<WebFrame*, OwnPtr<blink::FrameOwner> > m_ownersForChildren;
 };
 
 DEFINE_TYPE_CASTS(WebRemoteFrameImpl, WebFrame, frame, frame->isWebRemoteFrame(), frame.isWebRemoteFrame());
 
 } // namespace blink
 
 #endif // WebRemoteFrameImpl_h