Mac: Fix theme image drawing when building with >=10.9 SDK.

chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h

Index: chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h b/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
new file mode 100644
index 0000000000000000000000000000000000000000..c9ed44030761ef48f82e406e1f836821ddd0988f
--- /dev/null
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_background_view.h
@@ -0,0 +1,17 @@
+// Copyright 2014 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_TABS_TAB_STRIP_BACKGROUND_VIEW_H_
+#define CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_BACKGROUND_VIEW_H_
+
+#import <Cocoa/Cocoa.h>
+
+// A view that draws the theme image in the top area of the window (behind the
+// tab strip area). It should be arranged so that its z-order is below its
+// overlapping sibling views (window controls, tab strip view, profile button
+// and fullscreen button).
+@interface TabStripBackgroundView : NSView
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_BACKGROUND_VIEW_H_