Move EME key system knowledge from content/ to chrome/.

chrome/renderer/media/chrome_key_systems.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 "content/renderer/media/crypto/key_systems_info.h"
+#include "chrome/renderer/media/chrome_key_systems.h"
 
 #include "base/logging.h"
-#include "third_party/WebKit/public/platform/WebString.h"
 
 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
 
 // The following must be after widevine_cdm_version.h.
 
 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
 #include <gnu/libc-version.h>
 #include "base/version.h"
 #endif
 
-#if defined(DISABLE_WIDEVINE_CDM_CANPLAYTYPE)
-#include "base/command_line.h"
-#include "media/base/media_switches.h"
-#endif
-
-namespace content {
+using content::KeySystemInfo;
 
 static const char kClearKeyKeySystem[] = "webkit-org.w3.clearkey";
 
 static const char kAudioWebM[] = "audio/webm";
 static const char kVideoWebM[] = "video/webm";
 static const char kVorbis[] = "vorbis";
 static const char kVorbisVP8[] = "vorbis,vp8,vp8.0";
 
 static const char kAudioMp4[] = "audio/mp4";
 static const char kVideoMp4[] = "video/mp4";
 static const char kMp4a[] = "mp4a";
 static const char kAvc1[] = "avc1";
 static const char kMp4aAvc1[] = "mp4a,avc1";
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
+// Defines bitmask values used to specify supported codecs.
+// Each value represents a codec within a specific container.
 enum SupportedCodecs {
   WEBM_VP8_AND_VORBIS = 1 << 0,
 #if defined(USE_PROPRIETARY_CODECS)
   MP4_AAC = 1 << 1,
   MP4_AVC1 = 1 << 2,
 #endif  // defined(USE_PROPRIETARY_CODECS)
 };
 
-static void AddWidevineForTypes(
+static void AddWidevineWithCodecs(
     SupportedCodecs supported_codecs,
     std::vector<KeySystemInfo>* concrete_key_systems) {
   static const char kWidevineParentKeySystem[] = "com.widevine";
 #if defined(OS_ANDROID)
   static const uint8 kWidevineUuid[16] = {
       0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,
       0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED };
 #endif
 
 #if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
@@ skipping 39 matching lines @@
 
 #if defined(USE_PROPRIETARY_CODECS)
 #if defined(WIDEVINE_CDM_AAC_SUPPORT_AVAILABLE)
   supported_codecs = static_cast<SupportedCodecs>(supported_codecs | MP4_AAC);
 #endif
 #if defined(WIDEVINE_CDM_AVC1_SUPPORT_AVAILABLE)
   supported_codecs = static_cast<SupportedCodecs>(supported_codecs | MP4_AVC1);
 #endif
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
-  AddWidevineForTypes(supported_codecs, concrete_key_systems);
+  AddWidevineWithCodecs(supported_codecs, concrete_key_systems);
 }
 #elif defined(OS_ANDROID)
 static void AddAndroidWidevine(
     std::vector<KeySystemInfo>* concrete_key_systems) {
   SupportedCodecs supported_codecs = MP4_AAC | MP4_AVC1;
-  AddWidevineForTypes(supported_codecs, concrete_key_systems);
+  AddWidevineWithCodecs(supported_codecs, concrete_key_systems);
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)
 #endif  // defined(WIDEVINE_CDM_AVAILABLE)
 
 static void AddClearKey(std::vector<KeySystemInfo>* concrete_key_systems) {
   KeySystemInfo info(kClearKeyKeySystem);
 
   info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
   info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
 #if defined(USE_PROPRIETARY_CODECS)
@@ skipping 23 matching lines @@
   info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
   info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1));
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
   info.pepper_type = kExternalClearKeyPepperType;
 
   concrete_key_systems->push_back(info);
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
-void AddKeySystems(std::vector<KeySystemInfo>* key_systems_info) {
+void AddChromeKeySystems(std::vector<KeySystemInfo>* key_systems_info) {
   AddClearKey(key_systems_info);
 
 #if defined(ENABLE_PEPPER_CDMS)
   AddExternalClearKey(key_systems_info);
 #endif
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
 #if defined(ENABLE_PEPPER_CDMS)
   AddPepperBasedWidevine(key_systems_info);
 #elif defined(OS_ANDROID)
   AddAndroidWidevine(key_systems_info);
 #endif
 #endif
 }
-
-bool IsCanPlayTypeSuppressed(const std::string& key_system) {
-#if defined(DISABLE_WIDEVINE_CDM_CANPLAYTYPE)
-  // See http://crbug.com/237627.
-  if (key_system == kWidevineKeySystem &&
-      !CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kOverrideEncryptedMediaCanPlayType))
-    return true;
-#endif
-  return false;
-}
-
-std::string KeySystemNameForUMAInternal(const WebKit::WebString& key_system) {
-  if (key_system == kClearKeyKeySystem)
-    return "ClearKey";
-#if defined(WIDEVINE_CDM_AVAILABLE)
-  if (key_system == kWidevineKeySystem)
-    return "Widevine";
-#endif  // WIDEVINE_CDM_AVAILABLE
-  return "Unknown";
-}
-
-} // namespace content