Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/ui/browser_instant_controller.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 CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 40 matching lines @@
   void SetInstantSuggestion(const InstantSuggestion& suggestion);
 
   // Invoked by |instant_| to get the bounds that the preview is placed at,
   // in screen coordinated.
   gfx::Rect GetInstantBounds();
 
   // Invoked by |instant_| to notify that the preview gained focus, usually due
   // to the user clicking on it.
   void InstantPreviewFocused();
 
+  // Invoked by |instant_| to notify that the Instant page searchbox lost focus.
+  void OnWebSearchBoxBlur();
+
+  // Invoked by |instant_| to notify that the Instant page searchbox got focus.
+  void OnWebSearchBoxFocus();
+
   // Invoked by |instant_| to get the currently active tab, over which the
   // preview would be shown.
   TabContents* GetActiveTabContents() const;
 
   // Overridden from PrefObserver:
   virtual void OnPreferenceChanged(PrefServiceBase* service,
                                    const std::string& pref_name) OVERRIDE;
 
   // Overridden from TabStripModelObserver:
   virtual void ActiveTabChanged(content::WebContents* old_contents,
@@ skipping 15 matching lines @@
   InstantUnloadHandler instant_unload_handler_;
 
   PrefChangeRegistrar profile_pref_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserInstantController);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_INSTANT_CONTROLLER_H_