Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/ui/omnibox/omnibox_edit_model.h

Index: chrome/browser/ui/omnibox/omnibox_edit_model.h
diff --git a/chrome/browser/ui/omnibox/omnibox_edit_model.h b/chrome/browser/ui/omnibox/omnibox_edit_model.h
index 6caf62f542932a94b4d3cbe564454c88cc6574c4..6906774a3d7fd7ede55a4e93805fb5f4a7fe60e7 100644
--- a/chrome/browser/ui/omnibox/omnibox_edit_model.h
+++ b/chrome/browser/ui/omnibox/omnibox_edit_model.h
@@ -37,13 +37,15 @@ class OmniboxEditModel : public AutocompleteControllerDelegate {
     State(bool user_input_in_progress,
           const string16& user_text,
           const string16& keyword,
-          bool is_keyword_hint);
+          bool is_keyword_hint,
+          bool is_focus_visible);
     ~State();
 
     bool user_input_in_progress;
     const string16 user_text;
     const string16 keyword;
     const bool is_keyword_hint;
+    const bool is_focus_visible;
   };
 
   OmniboxEditModel(OmniboxView* view,
@@ -191,6 +193,8 @@ class OmniboxEditModel : public AutocompleteControllerDelegate {
 
   bool has_focus() const { return has_focus_; }
 
+  bool is_focus_visible() const { return is_focus_visible_; }
+
   // Accessors for keyword-related state (see comments on keyword_ and
   // is_keyword_hint_).
   const string16& keyword() const { return keyword_; }
@@ -213,6 +217,10 @@ class OmniboxEditModel : public AutocompleteControllerDelegate {
   // control key is down (at the time we're gaining focus).
   void OnSetFocus(bool control_down);
 
+  // Sets the visibility of omnibox focus. Does not impact whether the omnibox
+  // currently has focus or not.
+  void SetFocusVisibility(bool visible);
+
   // Sent before |OnKillFocus| and before the popup is closed.
   void OnWillKillFocus(gfx::NativeView view_gaining_focus);
 
@@ -404,6 +412,11 @@ class OmniboxEditModel : public AutocompleteControllerDelegate {
   // Whether the edit has focus.
   bool has_focus_;
 
+  // Will the focus be visible? Note that this does NOT describe whether the
+  // omnibox currently has focus, only whether focusing will be visible when it
+  // is focused.
+  bool is_focus_visible_;
+
   // The URL of the currently displayed page.
   string16 permanent_text_;