Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/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_INSTANT_INSTANT_CONTROLLER_H_
 #define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 148 matching lines @@
                           int height,
                           InstantSizeUnits units);
 
   // Invoked by InstantLoader to notify that the Instant URL completed loading.
   void InstantLoaderPreviewLoaded(InstantLoader* loader);
 
   // Invoked by InstantLoader when it has determined whether or not the page
   // supports the Instant API.
   void InstantSupportDetermined(InstantLoader* loader, bool supports_instant);
 
+  // Invoked by InstantLoader to notify that the Instant page searchbox lost
+  // focus.
+  void OnWebSearchBoxBlur(InstantLoader* loader);
+
+  // Invoked by InstantLoader to notify that the Instant page searchbox received
+  // focus.
+  void OnWebSearchBoxFocus(InstantLoader* loader);
+
   // Invoked by InstantLoader when it has swapped a different TabContents into
   // the preview, usually because a prerendered page was navigated to.
   void SwappedTabContents(InstantLoader* loader);
 
   // Invoked by InstantLoader when the preview gains focus, usually due to the
   // user clicking on it.
   void InstantLoaderContentsFocused(InstantLoader* loader);
 
 #if defined(UNIT_TEST)
   // Accessors used only in tests.
@@ skipping 96 matching lines @@
   // Search terms extraction (for autocomplete history matches) doesn't work
   // on Instant URLs. So, whenever the user commits an Instant search, we add
   // an equivalent non-Instant search URL to history, so that the search shows
   // up in autocomplete history matches.
   GURL url_for_history_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantController);
 };
 
 #endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_H_