Add gfx::Insets::ToString().

app/gfx/insets.h

 // Copyright (c) 2006-2008 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 APP_GFX_INSETS_H_
 #define APP_GFX_INSETS_H_
 
 #include "build/build_config.h"
 
 #if defined(OS_LINUX)
 #include <gtk/gtkstyle.h>
 #endif
 
+#include <string>
+
 namespace gfx {
 
 //
 // An insets represents the borders of a container (the space the container must
 // leave at each of its edges).
 //
 
 class Insets {
  public:
   Insets() : top_(0), left_(0), bottom_(0), right_(0) {}
@@ skipping 45 matching lines @@
   }
 
   Insets& operator+=(const Insets& insets) {
     top_ += insets.top_;
     left_ += insets.left_;
     bottom_ += insets.bottom_;
     right_ += insets.right_;
     return *this;
   }
 
+  // Returns a string representation of the insets.
+  std::string ToString() const;
+
  private:
   int top_;
   int left_;
   int bottom_;
   int right_;
 };
 
-}  // namespace
+}  // namespace gfx
 
 #endif  // APP_GFX_INSETS_H_