media: Use platform specific folders for CDMs

media/cdm/external_clear_key_test_helper.cc

 // Copyright 2015 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 "media/cdm/external_clear_key_test_helper.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "build/build_config.h"
 #include "media/cdm/api/content_decryption_module.h"
+#include "media/cdm/cdm_paths.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 // INITIALIZE_CDM_MODULE is a macro in api/content_decryption_module.h.
 // However, we need to pass it as a string to GetFunctionPointer() once it
 // is expanded.
 #define STRINGIFY(X) #X
 #define MAKE_STRING(X) STRINGIFY(X)
 
+const char kClearKeyCdmBaseDirectory[] = "ClearKeyCdm";
+
 // File name of the External ClearKey CDM on different platforms.
 const base::FilePath::CharType kExternalClearKeyCdmFileName[] =
 #if defined(OS_MACOSX)
     FILE_PATH_LITERAL("libclearkeycdm.dylib");
 #elif defined(OS_WIN)
     FILE_PATH_LITERAL("clearkeycdm.dll");
 #else  // OS_LINUX, etc.
     FILE_PATH_LITERAL("libclearkeycdm.so");
 #endif
 
 ExternalClearKeyTestHelper::ExternalClearKeyTestHelper() {
   LoadLibrary();
 }
 
 ExternalClearKeyTestHelper::~ExternalClearKeyTestHelper() {
   UnloadLibrary();
 }
 
 void ExternalClearKeyTestHelper::LoadLibrary() {
   // Determine the location of the CDM. It is expected to be in the same
   // directory as the current module.
-  base::FilePath current_module_dir;
-  ASSERT_TRUE(PathService::Get(base::DIR_MODULE, &current_module_dir));
+  base::FilePath library_dir;
+  ASSERT_TRUE(PathService::Get(base::DIR_MODULE, &library_dir));
+  library_dir = library_dir.Append(

[ddorwin, 2016/05/19 00:04:26]

(relative?) path.

Naming in line 47 might be misleading if that is also a path.

[xhwang, 2016/05/20 00:22:35]

Done.

+      GetPlatformSpecificDirectory(kClearKeyCdmBaseDirectory));
   library_path_ =
-      current_module_dir.Append(base::FilePath(kExternalClearKeyCdmFileName));
+      library_dir.Append(base::FilePath(kExternalClearKeyCdmFileName));
   ASSERT_TRUE(base::PathExists(library_path_)) << library_path_.value();
 
   // Now load the CDM library.
   base::NativeLibraryLoadError error;
   library_.Reset(base::LoadNativeLibrary(library_path_, &error));
   ASSERT_TRUE(library_.is_valid()) << error.ToString();
 
   // Call INITIALIZE_CDM_MODULE()
   typedef void (*InitializeCdmFunc)();
   InitializeCdmFunc initialize_cdm_func = reinterpret_cast<InitializeCdmFunc>(
       library_.GetFunctionPointer(MAKE_STRING(INITIALIZE_CDM_MODULE)));
   ASSERT_TRUE(initialize_cdm_func) << "No INITIALIZE_CDM_MODULE in library";
   initialize_cdm_func();
 }
 
 void ExternalClearKeyTestHelper::UnloadLibrary() {
   // Call DeinitializeCdmModule()
   typedef void (*DeinitializeCdmFunc)();
   DeinitializeCdmFunc deinitialize_cdm_func =
       reinterpret_cast<DeinitializeCdmFunc>(
           library_.GetFunctionPointer("DeinitializeCdmModule"));
   ASSERT_TRUE(deinitialize_cdm_func) << "No DeinitializeCdmModule() in library";
   deinitialize_cdm_func();
 }
 
 }  // namespace media