Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/renderer/searchbox/searchbox.h

 // Copyright 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_RENDERER_SEARCHBOX_SEARCHBOX_H_
 #define CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "chrome/common/instant_types.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "content/public/renderer/render_view_observer_tracker.h"
 #include "ui/gfx/rect.h"
 
 namespace content {
 class RenderView;
 }
 
 class SearchBox : public content::RenderViewObserver,
                   public content::RenderViewObserverTracker<SearchBox> {
  public:
   explicit SearchBox(content::RenderView* render_view);
   virtual ~SearchBox();
 
   // Sends ViewHostMsg_SetSuggestions to the browser.
   void SetSuggestions(const std::vector<InstantSuggestion>& suggestions);
 
+  // Sends ViewHostMsg_OnWebSearchBoxFocusChange to the browser.
+  void OnWebSearchBoxFocusChange(bool is_focused);
+
   // Sends ViewHostMsg_ShowInstantPreview to the browser.
   void ShowInstantPreview(InstantShownReason reason,
                           int height,
                           InstantSizeUnits units);
 
   const string16& query() const { return query_; }
   bool verbatim() const { return verbatim_; }
   size_t selection_start() const { return selection_start_; }
   size_t selection_end() const { return selection_end_; }
   int results_base() const { return results_base_; }
@@ skipping 35 matching lines @@
   gfx::Rect rect_;
   std::vector<InstantAutocompleteResult> autocomplete_results_;
   size_t last_results_base_;
   std::vector<InstantAutocompleteResult> last_autocomplete_results_;
   bool active_tab_is_ntp_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBox);
 };
 
 #endif  // CHROME_RENDERER_SEARCHBOX_SEARCHBOX_H_