Fix a type mismatch on Windows caused by r201738.

third_party/widevine/cdm/widevine_cdm_common.h

 // 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.
 
 #ifndef WIDEVINE_CDM_WIDEVINE_CDM_COMMON_H_
 #define WIDEVINE_CDM_WIDEVINE_CDM_COMMON_H_
 
 #include "base/files/file_path.h"
 
 // This file defines constants common to all Widevine CDM versions.
 
 // Widevine CDM version contains 4 components, e.g. 1.4.0.195.
 const int kWidevineCdmVersionNumComponents = 4;
 
 // "alpha" is a temporary name until a convention is defined.
 const char kWidevineKeySystem[] = "com.widevine.alpha";
 
 const char kWidevineCdmDisplayName[] = "Widevine Content Decryption Module";
 // Will be parsed as HTML.
 const char kWidevineCdmDescription[] =
     "Enables Widevine licenses for playback of HTML audio/video content.";
 #if defined(ENABLE_PEPPER_CDMS)
 const char kWidevineCdmPluginMimeType[] = "application/x-ppapi-widevine-cdm";
 const char kWidevineCdmPluginMimeTypeDescription[] =
     "Widevine Content Decryption Module";
 #endif
 
 // File name of the CDM on different platforms.
-const base::FilePath::CharType kWidevineCdmFileName[] =
+const char kWidevineCdmFileName[] =
 #if defined(OS_MACOSX)
-    FILE_PATH_LITERAL("widevinecdm.dylib");
+    "widevinecdm.dylib";
 #elif defined(OS_WIN)
-    FILE_PATH_LITERAL("widevinecdm.dll");
+    "widevinecdm.dll";
 #else  // OS_LINUX, etc.
-    FILE_PATH_LITERAL("libwidevinecdm.so");
+    "libwidevinecdm.so";
 #endif
 
 #if defined(ENABLE_PEPPER_CDMS)
 // File name of the adapter on different platforms.
-const base::FilePath::CharType kWidevineCdmAdapterFileName[] =
+const char kWidevineCdmAdapterFileName[] =
 #if defined(OS_MACOSX)
-    FILE_PATH_LITERAL("widevinecdmadapter.plugin");
+    "widevinecdmadapter.plugin";
 #elif defined(OS_WIN)
-    FILE_PATH_LITERAL("widevinecdmadapter.dll");
+    "widevinecdmadapter.dll";
 #else  // OS_LINUX, etc.
-    FILE_PATH_LITERAL("libwidevinecdmadapter.so");
+    "libwidevinecdmadapter.so";
 #endif
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
 
 #if defined(ENABLE_PEPPER_CDMS) && (defined(OS_MACOSX) || defined(OS_WIN))
 // CDM is installed by the component installer instead of the Chrome installer.
 #define WIDEVINE_CDM_IS_COMPONENT
 #endif
 
 #endif  // WIDEVINE_CDM_WIDEVINE_CDM_COMMON_H_