[Chromecast] Make EME persistent license support optional

The recent refactoring from KeySystemsInfo meant we lost the option
to control whether persistent license support is enabled (see linked
bug).  Add the option back into the new system.

BUG=internal b/28844432

Review-Url: https://codereview.chromium.org/2032923002
Cr-Commit-Position: refs/heads/master@{#397827}

chromecast/renderer/cast_content_renderer_client.cc

@@ -103,7 +103,7 @@ void CastContentRendererClient::RenderViewCreated(
 void CastContentRendererClient::AddSupportedKeySystems(
     std::vector<std::unique_ptr<::media::KeySystemProperties>>*
         key_systems_properties) {
-  AddChromecastKeySystems(key_systems_properties);
+  AddChromecastKeySystems(key_systems_properties, false);
 }
 
 #if !defined(OS_ANDROID)

chromecast/renderer/key_systems_cast.cc

@@ -30,6 +30,10 @@ namespace {
 #if defined(PLAYREADY_CDM_AVAILABLE)
 class PlayReadyKeySystemProperties : public ::media::KeySystemProperties {
  public:
+  explicit PlayReadyKeySystemProperties(bool persistent_license_support)
+      : persistent_license_support_(persistent_license_support) {
+  }
+
   std::string GetKeySystemName() const override {
     return media::kChromecastPlayreadyKeySystem;
   }
@@ -53,7 +57,8 @@ class PlayReadyKeySystemProperties : public ::media::KeySystemProperties {
 #if defined(OS_ANDROID)
     return EmeSessionTypeSupport::NOT_SUPPORTED;
 #else
-    return EmeSessionTypeSupport::SUPPORTED;
+    return persistent_license_support_ ? EmeSessionTypeSupport::SUPPORTED
+        : EmeSessionType::NOT_SUPPORTED;
 #endif
   }
 
@@ -68,6 +73,9 @@ class PlayReadyKeySystemProperties : public ::media::KeySystemProperties {
   EmeFeatureSupport GetDistinctiveIdentifierSupport() const override {
     return EmeFeatureSupport::ALWAYS_ENABLED;
   }
+
+ private:
+  const bool persistent_license_support_;
 };
 #endif  // PLAYREADY_CDM_AVAILABLE
 
@@ -75,9 +83,11 @@ class PlayReadyKeySystemProperties : public ::media::KeySystemProperties {
 
 void AddChromecastKeySystems(
     std::vector<std::unique_ptr<::media::KeySystemProperties>>*
-        key_systems_properties) {
+        key_systems_properties,
+    bool enable_persistent_license_support) {
 #if defined(PLAYREADY_CDM_AVAILABLE)
-  key_systems_properties->emplace_back(new PlayReadyKeySystemProperties());
+  key_systems_properties->emplace_back(
+      new PlayReadyKeySystemProperties(enable_persistent_license_support));
 #endif  // defined(PLAYREADY_CDM_AVAILABLE)
 
 #if defined(WIDEVINE_CDM_AVAILABLE)

chromecast/renderer/key_systems_cast.h

@@ -17,7 +17,8 @@ namespace shell {
 
 void AddChromecastKeySystems(
     std::vector<std::unique_ptr<::media::KeySystemProperties>>*
-        key_systems_properties);
+        key_systems_properties,
+    bool enable_persistent_license_support);
 
 }  // namespace shell
 }  // namespace chromecast