Reland of media: Add experimental feature to enable Mojo CDM on desktop Chromium

content/browser/media/encrypted_media_browsertest.cc

 // Copyright (c) 2013 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/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/scoped_feature_list.h"
 #include "build/build_config.h"
 #include "content/browser/media/media_browsertest.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "media/base/media.h"
 #include "media/base/media_switches.h"
 #include "media/mojo/features.h"
+#include "ppapi/features/features.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/build_info.h"
 #endif
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
 
-#if BUILDFLAG(ENABLE_MOJO_CDM)
+#if BUILDFLAG(ENABLE_MOJO_CDM) && !BUILDFLAG(ENABLE_PEPPER_CDMS)
 // When mojo CDM is enabled, External Clear Key is supported in //content/shell/
 // by using mojo CDM with AesDecryptor running in the remote (e.g. GPU or
-// Browser) process.
-// Note that External Clear Key is also supported in chrome/ when pepper CDM is
-// used, which is tested in browser_tests.
+// Browser) process. When pepper CDM is supported, External Clear Key is
+// supported in chrome/, which is tested in browser_tests.
 #define SUPPORTS_EXTERNAL_CLEAR_KEY_IN_CONTENT_SHELL
 #endif
 
 namespace content {
 
 // Available key systems.
 const char kClearKeyKeySystem[] = "org.w3.clearkey";
 
 #if defined(SUPPORTS_EXTERNAL_CLEAR_KEY_IN_CONTENT_SHELL)
 const char kExternalClearKeyKeySystem[] = "org.chromium.externalclearkey";
@@ skipping 104 matching lines @@
   // We want to fail quickly when a test fails because an error is encountered.
   void AddTitlesToAwait(content::TitleWatcher* title_watcher) override {
     MediaBrowserTest::AddTitlesToAwait(title_watcher);
     title_watcher->AlsoWaitForTitle(base::ASCIIToUTF16(kEmeNotSupportedError));
     title_watcher->AlsoWaitForTitle(base::ASCIIToUTF16(kEmeKeyError));
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(switches::kIgnoreAutoplayRestrictionsForTests);
 #if defined(SUPPORTS_EXTERNAL_CLEAR_KEY_IN_CONTENT_SHELL)
-    command_line->AppendSwitchASCII(switches::kEnableFeatures,
-                                    media::kExternalClearKeyForTesting.name);
+    scoped_feature_list_.InitWithFeatures({media::kExternalClearKeyForTesting},
+                                          {});
 #endif
   }
+
+  base::test::ScopedFeatureList scoped_feature_list_;
 };
 
 using ::testing::Combine;
 using ::testing::Values;
 
 INSTANTIATE_TEST_CASE_P(SRC_ClearKey,
                         EncryptedMediaTest,
                         Combine(Values(kClearKeyKeySystem),
                                 Values(SrcType::SRC)));
 
@@ skipping 92 matching lines @@
   TestFrameSizeChange();
 }
 
 IN_PROC_BROWSER_TEST_F(EncryptedMediaTest, UnknownKeySystemThrowsException) {
   RunEncryptedMediaTest(kDefaultEmePlayer, "bear-a_enc-a.webm",
                         kWebMVorbisAudioOnly, "com.example.foo", SrcType::MSE,
                         kEmeNotSupportedError);
 }
 
 }  // namespace content