Implement {Start,Stop}CapturingKeyStrokes for Instant.

chrome/browser/instant/instant_loader.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_loader.h"
 
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/instant/instant_controller.h"
 #include "chrome/browser/thumbnails/thumbnail_tab_helper.h"
 #include "chrome/browser/ui/blocked_content/blocked_content_tab_helper.h"
@@ skipping 258 matching lines @@
   controller_->InstantSupportDetermined(contents(), supports_instant);
 }
 
 void InstantLoader::ShowInstantPreview(InstantShownReason reason,
                                        int height,
                                        InstantSizeUnits units) {
   InstantSupportDetermined(true);
   controller_->ShowInstantPreview(reason, height, units);
 }
 
+void InstantLoader::StartCapturingKeyStrokes() {
+  InstantSupportDetermined(true);
+  controller_->StartCapturingKeyStrokes();
+}
+
+void InstantLoader::StopCapturingKeyStrokes() {
+  InstantSupportDetermined(true);
+  // NOTE(samarth): the current implementation of the key capturing (invisible
+  // focus) doesn't require doing anything explicitly here.
+}
+
 void InstantLoader::Observe(int type,
                             const content::NotificationSource& source,
                             const content::NotificationDetails& details) {
 #if defined(OS_MACOSX)
   if (type == content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED) {
     if (content::RenderWidgetHostView* rwhv =
             contents_->GetRenderWidgetHostView())
       rwhv->SetTakesFocusOnlyOnMouseDown(true);
     return;
   }
@@ skipping 71 matching lines @@
                                            content::WebContents* new_contents) {
   DCHECK_EQ(old_contents, contents());
   CleanupPreviewContents();
   // We release here without deleting so that the caller still has the
   // responsibility for deleting the WebContents.
   ignore_result(contents_.release());
   contents_.reset(new_contents);
   SetupPreviewContents();
   controller_->SwappedWebContents();
 }