Preliminary implementation of Google-style dialogs in ash::internal::DialogFrameView

ui/gfx/insets.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 UI_GFX_INSETS_H_
 #define UI_GFX_INSETS_H_
 #pragma once
 
 #include <string>
 
 #include "build/build_config.h"
@@ skipping 61 matching lines @@
   }
 
   Insets& operator+=(const Insets& insets) {
     top_ += insets.top_;
     left_ += insets.left_;
     bottom_ += insets.bottom_;
     right_ += insets.right_;
     return *this;
   }
 
+  Insets operator-() const {
+    return Insets(-top_, -left_, -bottom_, -right_);
+  }
+
   // Returns a string representation of the insets.
   std::string ToString() const;
 
  private:
   int top_;
   int left_;
   int bottom_;
   int right_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_INSETS_H_