Cleanup: Better constify some strings in chrome.

chrome/utility/web_resource_unpacker.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.
 
 // This class is called by the WebResourceService in a sandboxed process
 // to unpack data retrieved from a web resource feed.  Right now, it
 // takes a string of data in JSON format, parses it, and hands it back
 // to the WebResourceService as a list of items.  In the future
 // it will be set up to unpack and verify image data in addition to
 // just parsing a JSON feed.
 
 #ifndef CHROME_UTILITY_WEB_RESOURCE_UNPACKER_H_
 #define CHROME_UTILITY_WEB_RESOURCE_UNPACKER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 class WebResourceUnpacker {
  public:
-  static const char* kInvalidDataTypeError;
-  static const char* kUnexpectedJSONFormatError;
+  static const char kInvalidDataTypeError[];
+  static const char kUnexpectedJSONFormatError[];
 
   explicit WebResourceUnpacker(const std::string &resource_data);
   ~WebResourceUnpacker();
 
   // This does the actual parsing.  In case of an error, error_message_
   // is set to an appropriate value.
   bool Run();
 
   // Returns the last error message set by Run().
   const std::string& error_message() { return error_message_; }
@@ skipping 10 matching lines @@
   // Holds the result of JSON parsing of resource_data_.
   scoped_ptr<base::DictionaryValue> parsed_json_;
 
   // Holds the last error message produced by Run().
   std::string error_message_;
 
   DISALLOW_COPY_AND_ASSIGN(WebResourceUnpacker);
 };
 
 #endif  // CHROME_UTILITY_WEB_RESOURCE_UNPACKER_H_