Make resource_bundle compile on Linux.

chrome/common/gfx/chrome_font.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 CHROME_COMMON_GFX_CHROME_FONT_H_
 #define CHROME_COMMON_GFX_CHROME_FONT_H_
 
 #include "build/build_config.h"
 
 #include <string>
@@ skipping 97 matching lines @@
 
   // Dialog units to pixels conversion.
   // See http://support.microsoft.com/kb/145994 for details.
   int horizontal_dlus_to_pixels(int dlus) {
     return dlus * font_ref_->dlu_base_x() / 4;
   }
   int vertical_dlus_to_pixels(int dlus) {
     return dlus * font_ref_->height() / 8;
   }
 #elif defined(OS_LINUX)
-  // We need a copy constructor to deal with the Skia reference counting.
+  // We need a copy constructor and assignment operator to deal with
+  // the Skia reference counting.
   ChromeFont(const ChromeFont& other);
+  ChromeFont& operator=(const ChromeFont& other);
   // Setup a Skia context to use the current typeface
   void PaintSetup(SkPaint* paint) const;
 #endif
 
  private:
 
 #if defined(OS_WIN)
   // Chrome text drawing bottoms out in the Windows GDI functions that take an
   // HFONT (an opaque handle into Windows). To avoid lots of GDI object
   // allocation and destruction, ChromeFont indirectly refers to the HFONT
@@ skipping 75 matching lines @@
   // Cached metrics, generated at construction
   int height_;
   int ascent_;
   int avg_width_;
 #endif
 
 };
 
 #endif  // CHROME_COMMON_GFX_CHROME_FONT_H_