notification balloons: Remove views and cocoa implementations of BalloonCollection.

chrome/browser/ui/cocoa/notifications/balloon_view_host_mac.h

Index: chrome/browser/ui/cocoa/notifications/balloon_view_host_mac.h
diff --git a/chrome/browser/ui/cocoa/notifications/balloon_view_host_mac.h b/chrome/browser/ui/cocoa/notifications/balloon_view_host_mac.h
deleted file mode 100644
index 9e9cedc6aefa50bd6cd6f03f3e9ea47881683824..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/cocoa/notifications/balloon_view_host_mac.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright (c) 2011 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_COCOA_NOTIFICATIONS_BALLOON_VIEW_HOST_MAC_H_
-#define CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_BALLOON_VIEW_HOST_MAC_H_
-
-#include "chrome/browser/notifications/balloon_host.h"
-
-// BalloonViewHost class is a delegate to the renderer host for the HTML
-// notification.  When initialized it creates a new RenderViewHost and loads
-// the contents of the toast into it.  It also handles links within the toast,
-// loading them into a new tab.
-class BalloonViewHost : public BalloonHost {
- public:
-  explicit BalloonViewHost(Balloon* balloon);
-
-  virtual ~BalloonViewHost();
-
-  // Changes the size of the balloon.
-  void UpdateActualSize(const gfx::Size& new_size);
-
-  // Accessors.
-  gfx::NativeView native_view() const;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BalloonViewHost);
-};
-
-#endif  // CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_BALLOON_VIEW_HOST_MAC_H_