Cleanup: Better constify some strings in chrome.

chrome/utility/web_resource_unpacker.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/utility/web_resource_unpacker.h"
 
 #include "base/json/json_reader.h"
 #include "base/values.h"
 
-const char* WebResourceUnpacker::kInvalidDataTypeError =
+const char WebResourceUnpacker::kInvalidDataTypeError[] =
     "Data from web resource server is missing or not valid JSON.";
 
-const char* WebResourceUnpacker::kUnexpectedJSONFormatError =
+const char WebResourceUnpacker::kUnexpectedJSONFormatError[] =
     "Data from web resource server does not have expected format.";
 
 WebResourceUnpacker::WebResourceUnpacker(const std::string &resource_data)
     : resource_data_(resource_data) {
 }
 
 WebResourceUnpacker::~WebResourceUnpacker() {
 }
 
 // TODO(mrc): Right now, this reads JSON data from the experimental popgadget
@@ skipping 12 matching lines @@
       error_message_ = kUnexpectedJSONFormatError;
       return false;
     }
     parsed_json_.reset(static_cast<base::DictionaryValue*>(value.release()));
     return true;
   }
   error_message_ = kInvalidDataTypeError;
   return false;
 }