Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/instant_controller.cc

Index: chrome/browser/instant/instant_controller.cc
diff --git a/chrome/browser/instant/instant_controller.cc b/chrome/browser/instant/instant_controller.cc
index f6c77257a3a0fc552bcbffa261dddca92df7700b..8182971768a8dea4e4312fcf6bc6dcd6ad9915a9 100644
--- a/chrome/browser/instant/instant_controller.cc
+++ b/chrome/browser/instant/instant_controller.cc
@@ -742,6 +742,14 @@ void InstantController::ShowInstantPreview(InstantShownReason reason,
     ShowLoader(reason, height, units);
 }
 
+void InstantController::StartCapturingKeyStrokes(
+    const content::WebContents* contents) {
+  // Ignore unless the loader is active and on the NTP.
+  if (extended_enabled_ && !instant_tab_ && loader_->contents() == contents &&

[sreeram, 2012/12/04 21:54:58]

You can drop the "loader_->contents() == contents" clause.

[samarth, 2012/12/04 22:13:43]

Done.

+      model_.mode().is_ntp())
+    browser_->FocusOmniboxInvisibly();
+}
+
 void InstantController::SwappedWebContents() {
   model_.SetPreviewContents(GetPreviewContents());
 }