Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/instant_controller.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/instant/instant_controller.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 724 matching lines @@
   }
 }
 
 void InstantController::ShowInstantPreview(InstantShownReason reason,
                                            int height,
                                            InstantSizeUnits units) {
   if (extended_enabled_)
     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());
 }
 
 void InstantController::InstantLoaderContentsFocused() {
 #if defined(USE_AURA)
   // On aura the omnibox only receives a focus lost if we initiate the focus
   // change. This does that.
   if (!model_.mode().is_default())
     browser_->InstantPreviewFocused();
@@ skipping 239 matching lines @@
   }
 
   std::map<std::string, int>::const_iterator iter =
       blacklisted_urls_.find(*instant_url);
   if (iter != blacklisted_urls_.end() &&
       iter->second > kMaxInstantSupportFailures)
     return false;
 
   return true;
 }