Add pin icon to the omnibar in windows 8 metro mode.

chrome/browser/ui/views/location_bar/metro_pin_view.h

Index: chrome/browser/ui/views/location_bar/metro_pin_view.h
diff --git a/chrome/browser/ui/views/location_bar/metro_pin_view.h b/chrome/browser/ui/views/location_bar/metro_pin_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..d888de24e9f2ce582e18a7d8879d80121d56c0ad
--- /dev/null
+++ b/chrome/browser/ui/views/location_bar/metro_pin_view.h
@@ -0,0 +1,39 @@
+// Copyright (c) 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_METRO_PIN_VIEW_H_
+#define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_METRO_PIN_VIEW_H_
+
+#include "chrome/browser/ui/views/location_bar/touchable_location_bar_view.h"
+#include "ui/views/controls/button/image_button.h"
+
+class CommandUpdater;
+
+class MetroPinView
+    : public views::ImageButton,
+      public views::ButtonListener,
+      public TouchableLocationBarView {
+ public:
+  explicit MetroPinView(CommandUpdater* command_updater);
+  virtual ~MetroPinView();
+
+  // When the page is already pinned, clicking the pin view will cause the page
+  // to become unpinned.
+  void SetIsPinned(bool is_pinned);
+
+  // views::ButtonListener.
+  virtual void ButtonPressed(Button* sender,
+                             const views::Event& event) OVERRIDE;
+
+  // TouchableLocationBarView.
+  virtual int GetBuiltInHorizontalPadding() const OVERRIDE;
+
+ private:
+  // The CommandUpdater for the Browser object that owns the location bar.
+  CommandUpdater* command_updater_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(MetroPinView);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_METRO_PIN_VIEW_H_