Move extensions manifest IconsHandler to //extensions

extensions/common/manifest_handlers/icons_handler.h

 // Copyright (c) 2013 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_EXTENSIONS_MANIFEST_HANDLERS_ICONS_HANDLER_H_
-#define CHROME_COMMON_EXTENSIONS_MANIFEST_HANDLERS_ICONS_HANDLER_H_
+#ifndef EXTENSIONS_COMMON_MANIFEST_HANDLERS_ICONS_HANDLER_H_
+#define EXTENSIONS_COMMON_MANIFEST_HANDLERS_ICONS_HANDLER_H_
 
 #include <string>
 
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_icon_set.h"
 #include "extensions/common/extension_resource.h"
 #include "extensions/common/manifest_handler.h"
 
+class GURL;
+
+namespace gfx {
+class ImageSkia;
+}
+
 namespace extensions {
 
 struct IconsInfo : public Extension::ManifestData {
   // Max size (both dimensions) for browser and page actions.
   static const int kPageActionIconMaxSize;
   static const int kBrowserActionIconMaxSize;
 
   // The icons for the extension.
   ExtensionIconSet icons;
 
@@ skipping 25 matching lines @@
   virtual bool Validate(const Extension* extension,
                         std::string* error,
                         std::vector<InstallWarning>* warnings) const OVERRIDE;
 
  private:
   virtual const std::vector<std::string> Keys() const OVERRIDE;
 };
 
 }  // namespace extensions
 
-#endif  // CHROME_COMMON_EXTENSIONS_MANIFEST_HANDLERS_ICONS_HANDLER_H_
+#endif  // EXTENSIONS_COMMON_MANIFEST_HANDLERS_ICONS_HANDLER_H_