Support unprefixed EME in HTMLViewer.

Tested with:
out/GN/mojo_shell
http://<host>/LayoutTests/media/encrypted-media/encrypted-media-playback-setmediakeys-before-src.html
--args-for='mojo://html_viewer --v=3 --enable-encrypted-media'

TBR=jamesr@chromium.org
BUG=444205
TEST=See above.

Review URL: https://codereview.chromium.org/815293002

Cr-Commit-Position: refs/heads/master@{#309565}

mojo/services/html_viewer/html_document.cc

@@ -6,11 +6,14 @@
 
 #include "base/bind.h"
 #include "base/location.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/thread_task_runner_handle.h"
+#include "media/blink/webencryptedmediaclient_impl.h"
+#include "media/cdm/default_cdm_factory.h"
 #include "mojo/public/cpp/application/connect.h"
 #include "mojo/public/cpp/system/data_pipe.h"
 #include "mojo/public/interfaces/application/shell.mojom.h"
@@ -100,11 +103,12 @@ HTMLDocument::HTMLDocument(
     WebMediaPlayerFactory* web_media_player_factory)
     : response_(response.Pass()),
       shell_(shell),
-      web_view_(NULL),
-      root_(NULL),
+      web_view_(nullptr),
+      root_(nullptr),
       view_manager_client_factory_(shell_, this),
       compositor_thread_(compositor_thread),
-      web_media_player_factory_(web_media_player_factory) {
+      web_media_player_factory_(web_media_player_factory),
+      web_encrypted_media_client_(nullptr) {
   exported_services_.AddService(this);
   exported_services_.AddService(&view_manager_client_factory_);
   WeakBindToPipe(&exported_services_, provider.PassMessagePipe());
@@ -196,8 +200,7 @@ blink::WebMediaPlayer* HTMLDocument::createMediaPlayer(
     blink::WebLocalFrame* frame,
     const blink::WebURL& url,
     blink::WebMediaPlayerClient* client) {
-  return web_media_player_factory_->CreateMediaPlayer(frame, url, client,
-                                                      shell_);
+  return createMediaPlayer(frame, url, client, nullptr);
 }
 
 blink::WebMediaPlayer* HTMLDocument::createMediaPlayer(
@@ -205,7 +208,8 @@ blink::WebMediaPlayer* HTMLDocument::createMediaPlayer(
     const blink::WebURL& url,
     blink::WebMediaPlayerClient* client,
     blink::WebContentDecryptionModule* initial_cdm) {
-  return createMediaPlayer(frame, url, client);
+  return web_media_player_factory_->CreateMediaPlayer(frame, url, client,
+                                                      initial_cdm, shell_);
 }
 
 blink::WebFrame* HTMLDocument::createChildFrame(
@@ -261,6 +265,14 @@ void HTMLDocument::didNavigateWithinPage(
   navigator_host_->DidNavigateLocally(history_item.urlString().utf8());
 }
 
+blink::WebEncryptedMediaClient* HTMLDocument::encryptedMediaClient() {
+  if (!web_encrypted_media_client_) {
+    web_encrypted_media_client_ = new media::WebEncryptedMediaClientImpl(
+        make_scoped_ptr(new media::DefaultCdmFactory()));
+  }
+  return web_encrypted_media_client_;
+}
+
 void HTMLDocument::OnViewBoundsChanged(View* view,
                                        const Rect& old_bounds,
                                        const Rect& new_bounds) {

mojo/services/html_viewer/html_document.h

@@ -28,6 +28,10 @@ namespace base {
 class MessageLoopProxy;
 }
 
+namespace media {
+class WebEncryptedMediaClientImpl;
+}
+
 namespace mojo {
 class ViewManager;
 class View;
@@ -97,6 +101,7 @@ class HTMLDocument : public blink::WebViewClient,
   virtual void didNavigateWithinPage(blink::WebLocalFrame* frame,
                                      const blink::WebHistoryItem& history_item,
                                      blink::WebHistoryCommitType commit_type);
+  virtual blink::WebEncryptedMediaClient* encryptedMediaClient();
 
   // ViewManagerDelegate methods:
   void OnEmbed(
@@ -131,6 +136,9 @@ class HTMLDocument : public blink::WebViewClient,
   scoped_refptr<base::MessageLoopProxy> compositor_thread_;
   WebMediaPlayerFactory* web_media_player_factory_;
 
+  // EncryptedMediaClient attached to this frame; lazily initialized.
+  media::WebEncryptedMediaClientImpl* web_encrypted_media_client_;
+
   // HTMLDocument owns these pointers.
   std::set<AxProviderImpl*> ax_provider_impls_;
 

mojo/services/html_viewer/html_viewer.cc

@@ -22,6 +22,7 @@
 #include "mojo/services/html_viewer/webmediaplayer_factory.h"
 #include "mojo/services/network/public/interfaces/network_service.mojom.h"
 #include "third_party/WebKit/public/web/WebKit.h"
+#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 
 #if !defined(COMPONENT_BUILD)
 #include "base/i18n/icu_util.h"
@@ -48,6 +49,9 @@ namespace html_viewer {
 // media::Renderer implementation.
 const char kEnableMojoMediaRenderer[] = "enable-mojo-media-renderer";
 
+// Enables support for Encrypted Media Extensions (e.g. MediaKeys).
+const char kEnableEncryptedMedia[] = "enable-encrypted-media";
+
 class HTMLViewer;
 
 class HTMLViewerApplication : public mojo::Application {
@@ -174,6 +178,9 @@ class HTMLViewer : public mojo::ApplicationDelegate,
     bool enable_mojo_media_renderer =
         command_line->HasSwitch(kEnableMojoMediaRenderer);
 
+    if (command_line->HasSwitch(kEnableEncryptedMedia))
+      blink::WebRuntimeFeatures::enableEncryptedMedia(true);
+
     compositor_thread_.Start();
     web_media_player_factory_.reset(new WebMediaPlayerFactory(
         compositor_thread_.message_loop_proxy(), enable_mojo_media_renderer));

mojo/services/html_viewer/webmediaplayer_factory.cc

@@ -78,6 +78,7 @@ blink::WebMediaPlayer* WebMediaPlayerFactory::CreateMediaPlayer(
     blink::WebLocalFrame* frame,
     const blink::WebURL& url,
     blink::WebMediaPlayerClient* client,
+    blink::WebContentDecryptionModule* initial_cdm,
     mojo::Shell* shell) {
 #if defined(OS_ANDROID)
   return nullptr;
@@ -98,9 +99,10 @@ blink::WebMediaPlayer* WebMediaPlayerFactory::CreateMediaPlayer(
                                           GetAudioHardwareConfig()));
   }
 
-  media::WebMediaPlayerParams params(
-      media::WebMediaPlayerParams::DeferLoadCB(), CreateAudioRendererSink(),
-      media_log, GetMediaThreadTaskRunner(), compositor_task_runner_, nullptr);
+  media::WebMediaPlayerParams params(media::WebMediaPlayerParams::DeferLoadCB(),
+                                     CreateAudioRendererSink(), media_log,
+                                     GetMediaThreadTaskRunner(),
+                                     compositor_task_runner_, initial_cdm);
   base::WeakPtr<media::WebMediaPlayerDelegate> delegate;
 
   scoped_ptr<media::CdmFactory> cdm_factory(new media::DefaultCdmFactory());

mojo/services/html_viewer/webmediaplayer_factory.h

@@ -17,6 +17,7 @@ class SingleThreadTaskRunner;
 }
 
 namespace blink {
+class WebContentDecryptionModule;
 class WebMediaPlayer;
 class WebLocalFrame;
 class WebURL;
@@ -44,9 +45,11 @@ class WebMediaPlayerFactory {
       bool enable_mojo_media_renderer);
   ~WebMediaPlayerFactory();
 
-  blink::WebMediaPlayer* CreateMediaPlayer(blink::WebLocalFrame* frame,
+  blink::WebMediaPlayer* CreateMediaPlayer(
+      blink::WebLocalFrame* frame,
       const blink::WebURL& url,
       blink::WebMediaPlayerClient* client,
+      blink::WebContentDecryptionModule* initial_cdm,
       mojo::Shell* shell);
 
  private:

mojo/services/html_viewer/webmimeregistry_impl.cc

@@ -8,6 +8,7 @@
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "media/base/key_systems.h"
 #include "media/filters/stream_parser_factory.h"
 #include "net/base/mime_util.h"
 #include "third_party/WebKit/public/platform/WebString.h"
@@ -104,8 +105,24 @@ bool WebMimeRegistryImpl::supportsEncryptedMediaMIMEType(
     const blink::WebString& key_system,
     const blink::WebString& mime_type,
     const blink::WebString& codecs) {
-  NOTIMPLEMENTED();
+  // Only supports ASCII parameters.
+  if (!base::IsStringASCII(key_system) || !base::IsStringASCII(mime_type) ||
+      !base::IsStringASCII(codecs)) {
+    return false;
+  }
+
+  if (key_system.isEmpty())
     return false;
+
+  const std::string mime_type_ascii = base::UTF16ToASCII(mime_type);
+
+  std::vector<std::string> codec_vector;
+  bool strip_suffix = !net::IsStrictMediaMimeType(mime_type_ascii);
+  net::ParseCodecString(base::UTF16ToASCII(codecs), &codec_vector,
+                        strip_suffix);
+
+  return media::IsSupportedKeySystemWithMediaMimeType(
+      mime_type_ascii, codec_vector, base::UTF16ToASCII(key_system));
 }
 
 blink::WebMimeRegistry::SupportsType