Adds selection expansion support for Contextual Search.

content/public/browser/web_contents.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 399 matching lines @@
   virtual void Redo() = 0;
   virtual void Cut() = 0;
   virtual void Copy() = 0;
   virtual void CopyToFindPboard() = 0;
   virtual void Paste() = 0;
   virtual void PasteAndMatchStyle() = 0;
   virtual void Delete() = 0;
   virtual void SelectAll() = 0;
   virtual void Unselect() = 0;
 
+  // Adjust the selection starting and ending points in the focused frame by
+  // the given amounts. A negative amount moves the selection towards the
+  // beginning of the document, a positive amount moves the selection towards
+  // the end of the document.
+  virtual void AdjustSelectionByCharacterOffset(int start_adjust,
+                                                int end_adjust) = 0;
+
   // Replaces the currently selected word or a word around the cursor.
   virtual void Replace(const base::string16& word) = 0;
 
   // Replaces the misspelling in the current selection.
   virtual void ReplaceMisspelling(const base::string16& word) = 0;
 
   // Let the renderer know that the menu has been closed.
   virtual void NotifyContextMenuClosed(
       const CustomContextMenuContext& context) = 0;
 
@@ skipping 250 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_