Gtk: Make click target of tabs match their appearance.

chrome/browser/ui/tabs/tab_resources.h

+// 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_TABS_TAB_RESOURCES_H_
+#define CHROME_BROWSER_UI_TABS_TAB_RESOURCES_H_
+#pragma once
+
+namespace gfx {
+class Path;
+}
+
+// Common resources for tab widgets. Currently this is used on Views and Gtk,
+// but not on Cocoa.
+class TabResources {
+ public:
+  // Return a |path| containing the region that matches the bitmap display of
+  // a tab of the given |width| and |height|, for input event hit testing.
+  static void GetHitTestMask(int width, int height, gfx::Path* path);
+};
+
+#endif  // CHROME_BROWSER_UI_TABS_TAB_RESOURCES_H_