Instant API: tell page whether the browser is capturing key strokes.

chrome/browser/instant/instant_controller.h

Index: chrome/browser/instant/instant_controller.h
diff --git a/chrome/browser/instant/instant_controller.h b/chrome/browser/instant/instant_controller.h
index f3448cd557667c6f429a69a8d7c9578ee9a5356c..ea908698a758806338495dbfedd914d4142bff0e 100644
--- a/chrome/browser/instant/instant_controller.h
+++ b/chrome/browser/instant/instant_controller.h
@@ -86,7 +86,7 @@ class InstantController {
 
   // The omnibox has gained focus. Preload the default search engine, in
   // anticipation of the user typing a query.
-  void OmniboxGotFocus();
+  void OmniboxGotFocus(bool focus_is_visible);
 
   // The search mode in the active tab has changed. Pass the message down to
   // the loader which will notify the renderer.
@@ -183,6 +183,9 @@ class InstantController {
   // Send the omnibox dropdown bounds to the page.
   void SendBoundsToPage();
 
+  // Helper to send key capture mode to the page.
+  void SendKeyCaptureModeToPage();
+
   // If |template_url| is a valid TemplateURL for use with Instant, fills in
   // |instant_url| and returns true; returns false otherwise.
   // Note: If the command-line switch kInstantURL is set, this method uses its
@@ -220,8 +223,13 @@ class InstantController {
   // True if the last match passed to Update() was a search (versus a URL).
   bool last_match_was_search_;
 
-  // True if the omnibox is focused, false otherwise.
-  bool is_omnibox_focused_;
+  // Omnibox focus state.
+  enum OmniboxFocusState {
+    NONE = 0,  // Not focused
+    VISIBLE = 1, // Visibly focused
+    INVISIBLE = 2  // Invisibly focused
+  };
+  OmniboxFocusState omnibox_focus_state_;
 
   // The search model mode for the active tab.
   chrome::search::Mode search_mode_;