Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/ui/views/omnibox/omnibox_view_views.cc

Index: chrome/browser/ui/views/omnibox/omnibox_view_views.cc
diff --git a/chrome/browser/ui/views/omnibox/omnibox_view_views.cc b/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
index f4c00643fe23d73adee5ea7d4e4f7071a42908bf..a02d6652db8d97efb0634d242bafd2f1d4f6215a 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
+++ b/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
@@ -569,6 +569,13 @@ void OmniboxViewViews::UpdatePopup() {
 }
 
 void OmniboxViewViews::SetFocus() {
+  SetFocusVisibility(true);
+  // In views-implementation, the focus is on textfield rather than OmniboxView.
+  textfield_->RequestFocus();
+}
+
+void OmniboxViewViews::SetInvisibleFocus() {
+  SetFocusVisibility(false);
   // In views-implementation, the focus is on textfield rather than OmniboxView.
   textfield_->RequestFocus();
 }
@@ -599,6 +606,7 @@ void OmniboxViewViews::OnRevertTemporaryText() {
 }
 
 void OmniboxViewViews::OnBeforePossibleChange() {
+  SetFocusVisibility(true);
   // Record our state.
   text_before_change_ = GetText();
   textfield_->GetSelectedRange(&sel_before_change_);
@@ -936,3 +944,8 @@ void OmniboxViewViews::OnPaste() {
     textfield_->ReplaceSelection(text);
   }
 }
+
+void OmniboxViewViews::SetFocusVisibility(bool focus_is_visible) {
+  model()->OnFocusVisibilityChange(focus_is_visible);
+  // TODO(mathp): actually make focus invisible
+}