media: Support creation and SetCdm() for mojo based CDM.

components/html_viewer/html_document.cc

Index: components/html_viewer/html_document.cc
diff --git a/components/html_viewer/html_document.cc b/components/html_viewer/html_document.cc
index bb7163763313ae216db3b56b7cddf7e395c96cf5..d2345339353725a1d89ad007c88bcd5ad73931b2 100644
--- a/components/html_viewer/html_document.cc
+++ b/components/html_viewer/html_document.cc
@@ -24,6 +24,8 @@
 #include "media/blink/webencryptedmediaclient_impl.h"
 #include "media/cdm/default_cdm_factory.h"
 #include "media/filters/default_media_permission.h"
+#include "media/mojo/interfaces/content_decryption_module_factory.mojom.h"
+#include "media/mojo/services/mojo_cdm_factory.h"
 #include "mojo/application/public/cpp/application_impl.h"
 #include "mojo/application/public/cpp/connect.h"
 #include "mojo/application/public/interfaces/shell.mojom.h"
@@ -392,8 +394,21 @@ media::MediaPermission* HTMLDocument::GetMediaPermission() {
 }
 
 media::CdmFactory* HTMLDocument::GetCdmFactory() {
-  if (!cdm_factory_)
-    cdm_factory_.reset(new media::DefaultCdmFactory());
+  if (!cdm_factory_) {
+    if (setup_->enable_mojo_media_renderer()) {
+      ServiceProviderPtr media_service_provider;
+      mojo::URLRequestPtr request(mojo::URLRequest::New());
+      request->url = mojo::String::From("mojo:media");
+      shell_->ConnectToApplication(request.Pass(),
+                                   GetProxy(&media_service_provider), nullptr);
+      mojo::ContentDecryptionModuleFactoryPtr cdm_factory_ptr;
+      mojo::ConnectToService(media_service_provider.get(), &cdm_factory_ptr);
+      cdm_factory_.reset(new media::MojoCdmFactory(cdm_factory_ptr.Pass()));
+    } else {
+      cdm_factory_.reset(new media::DefaultCdmFactory());
+    }
+  }
+
   return cdm_factory_.get();
 }