Cleanup: Better constify some strings in base.

base/files/file_path.cc

 // Copyright (c) 2012 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 "base/files/file_path.h"
 
 #include <string.h>
 #include <algorithm>
 
 #include "base/basictypes.h"
@@ skipping 17 matching lines @@
 #elif defined(OS_MACOSX)
 #include <CoreFoundation/CoreFoundation.h>
 #endif
 
 namespace base {
 
 typedef FilePath::StringType StringType;
 
 namespace {
 
-const char* kCommonDoubleExtensionSuffixes[] = { "gz", "z", "bz2", "bz" };
-const char* kCommonDoubleExtensions[] = { "user.js" };
+const char* const kCommonDoubleExtensionSuffixes[] = { "gz", "z", "bz2", "bz" };
+const char* const kCommonDoubleExtensions[] = { "user.js" };
 
 const FilePath::CharType kStringTerminator = FILE_PATH_LITERAL('\0');
 
 // If this FilePath contains a drive letter specification, returns the
 // position of the last character of the drive letter specification,
 // otherwise returns npos.  This can only be true on Windows, when a pathname
 // begins with a letter followed by a colon.  On other platforms, this always
 // returns npos.
 StringType::size_type FindDriveLetter(const StringType& path) {
 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
@@ skipping 1265 matching lines @@
 bool FilePath::IsContentUri() const {
   return StartsWithASCII(path_, "content://", false /*case_sensitive*/);
 }
 #endif
 
 }  // namespace base
 
 void PrintTo(const base::FilePath& path, std::ostream* out) {
   *out << path.value();
 }