Add onfocuschange to the Extended Search API, with associated isFocused attribute.

chrome/renderer/searchbox/searchbox.h

Index: chrome/renderer/searchbox/searchbox.h
diff --git a/chrome/renderer/searchbox/searchbox.h b/chrome/renderer/searchbox/searchbox.h
index 441994ba3d30850bdc8d54c39ed85914caa3d88b..2f80b00793fadc5acee7c91b8f4264386db72d43 100644
--- a/chrome/renderer/searchbox/searchbox.h
+++ b/chrome/renderer/searchbox/searchbox.h
@@ -11,6 +11,7 @@
 #include "base/string16.h"
 #include "chrome/common/instant_restricted_id_cache.h"
 #include "chrome/common/instant_types.h"
+#include "chrome/common/omnibox_focus_state.h"
 #include "chrome/common/search_types.h"
 #include "content/public/common/page_transition_types.h"
 #include "content/public/renderer/render_view_observer.h"
@@ -65,11 +66,16 @@ class SearchBox : public content::RenderViewObserver,
   bool query_is_restricted() const { return query_is_restricted_; }
   size_t selection_start() const { return selection_start_; }
   size_t selection_end() const { return selection_end_; }
-  bool is_key_capture_enabled() const { return is_key_capture_enabled_; }
   bool display_instant_results() const { return display_instant_results_; }
   const string16& omnibox_font() const { return omnibox_font_; }
   size_t omnibox_font_size() const { return omnibox_font_size_; }
 
+  // Returns whether the omnibox is focused.
+  bool is_focused() const;
+
+  // Returns whether key capturing is enabled.
+  bool is_key_capture_enabled() const;
+
   // In extended Instant, returns the start-edge margin of the location bar in
   // screen pixels.
   int GetStartMargin() const;
@@ -134,7 +140,8 @@ class SearchBox : public content::RenderViewObserver,
                          bool verbatim,
                          size_t selection_start,
                          size_t selection_end);
-  void OnKeyCaptureChange(bool is_key_capture_enabled);
+  void OnKeyCaptureChange(OmniboxFocusState new_focus_state,
+                          OmniboxFocusChangeReason reason);
   void OnSetDisplayInstantResults(bool display_instant_results);
   void OnThemeChanged(const ThemeBackgroundInfo& theme_info);
   void OnThemeAreaHeightChanged(int height);
@@ -159,7 +166,7 @@ class SearchBox : public content::RenderViewObserver,
   size_t selection_end_;
   int start_margin_;
   gfx::Rect popup_bounds_;
-  bool is_key_capture_enabled_;
+  OmniboxFocusState omnibox_focus_state_;
   ThemeBackgroundInfo theme_info_;
   bool display_instant_results_;
   string16 omnibox_font_;