Adds support for showing the match preview on views. It's behind the

chrome/browser/tab_contents/tab_contents_delegate.h

 // Copyright (c) 2010 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 CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_
 #pragma once
 
 #include <string>
 
@@ skipping 254 matching lines @@
 
   // Notification that the preferred size of the contents has changed.
   // Only called if ShouldEnablePreferredSizeNotifications() returns true.
   virtual void UpdatePreferredSize(const gfx::Size& pref_size);
 
   // Notifies the delegate that something has changed about what content the
   // TabContents is displaying. Currently this is only fired when displaying
   // PDF using the internal PDF plugin.
   virtual void ContentTypeChanged(TabContents* source);
 
+  // Sent when the user does a gesture that results in committing the match
+  // preview. The delegate should replace |source| with the |source|'s match
+  // preview TabContents.
+  virtual void CommitMatchPreview(TabContents* source);
+
  protected:
   virtual ~TabContentsDelegate();
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_DELEGATE_H_