media: Add a web preference to enable encrypted media

chrome/browser/media/encrypted_media_browsertest.cc

 // Copyright 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 <memory>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/media/media_browsertest.h"
 #include "chrome/browser/media/test_license_server.h"
 #include "chrome/browser/media/wv_test_license_server_config.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
 #include "chrome/test/base/test_launcher_utils.h"
+#include "components/prefs/pref_service.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "media/base/media_switches.h"
 #include "ppapi/features/features.h"
 #include "testing/gtest/include/gtest/gtest-spi.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/build_info.h"
 #endif
 
@@ skipping 374 matching lines @@
     query_params.push_back(std::make_pair("keySystem", CurrentKeySystem()));
     query_params.push_back(std::make_pair("runEncrypted", "1"));
     query_params.push_back(
         std::make_pair("videoFormat", ConvertContainerFormat(video_format)));
     query_params.push_back(
         std::make_pair("audioFormat", ConvertContainerFormat(audio_format)));
     RunEncryptedMediaTestPage("mse_different_containers.html",
                               CurrentKeySystem(), query_params, kEnded);
   }
 
+  void DisableEncryptedMedia() {
+    PrefService* pref_service = browser()->profile()->GetPrefs();
+    pref_service->SetBoolean(prefs::kWebKitEncryptedMediaEnabled, false);
+  }
+
  protected:
   void SetUpCommandLine(base::CommandLine* command_line) override {
     EncryptedMediaTestBase::SetUpCommandLine(command_line);
     SetUpCommandLineForKeySystem(CurrentKeySystem(), command_line);
   }
 };
 
 using ::testing::Combine;
 using ::testing::Values;
 
@@ skipping 101 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, FrameSizeChangeVideo) {
   if (!IsPlayBackPossible(CurrentKeySystem())) {
     DVLOG(0) << "Skipping test - FrameSizeChange test requires video playback.";
     return;
   }
   TestFrameSizeChange();
 }
 
+IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, EncryptedMediaDisabled) {
+  DisableEncryptedMedia();
+  RunEncryptedMediaTest(kDefaultEmePlayer, "bear-a_enc-a.webm",
+                        kWebMVorbisAudioOnly, CurrentKeySystem(),
+                        CurrentSourceType(), kNoSessionToLoad, false,
+                        PlayCount::ONCE, kEmeNotSupportedError);
+}
+
 #if defined(USE_PROPRIETARY_CODECS)
 // Crashes on Mac only.  http://crbug.com/621857
 #if defined(OS_MACOSX)
 #define MAYBE_Playback_VideoOnly_MP4 DISABLED_Playback_VideoOnly_MP4
 #else
 #define MAYBE_Playback_VideoOnly_MP4 Playback_VideoOnly_MP4
 #endif
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, MAYBE_Playback_VideoOnly_MP4) {
   // MP4 without MSE is not support yet, http://crbug.com/170793.
   if (CurrentSourceType() != MSE) {
@@ skipping 122 matching lines @@
 IN_PROC_BROWSER_TEST_F(ECKEncryptedMediaTest, LoadLoadableSession) {
   TestPlaybackCase(kExternalClearKeyKeySystem, kLoadableSession, kEnded);
 }
 
 IN_PROC_BROWSER_TEST_F(ECKEncryptedMediaTest, LoadUnknownSession) {
   TestPlaybackCase(kExternalClearKeyKeySystem, kUnknownSession,
                    kEmeSessionNotFound);
 }
 
 #endif  // BUILDFLAG(ENABLE_PEPPER_CDMS)