Implement MediaSession (metadata) per frame [NOT READY, HAS DEPENDENCY]

content/browser/media/android/browser_media_session_manager_browsertest.cc

Index: content/browser/media/android/browser_media_session_manager_browsertest.cc
diff --git a/content/browser/media/android/browser_media_session_manager_browsertest.cc b/content/browser/media/android/browser_media_session_manager_browsertest.cc
index ddd11e1a1602aac54ba781a025d91c8023443d8b..b9dd8378c99d9dfa419ae76477e47878c7a06e7a 100644
--- a/content/browser/media/android/browser_media_session_manager_browsertest.cc
+++ b/content/browser/media/android/browser_media_session_manager_browsertest.cc
@@ -12,7 +12,7 @@
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/media/android/media_web_contents_observer_android.h"
-#include "content/public/browser/web_contents.h"
+#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/media_metadata.h"
 #include "content/public/test/browser_test_utils.h"
@@ -35,17 +35,13 @@ std::string BuildSetMetadataScript(
     const base::Optional<MediaMetadata>& metadata) {
   std::ostringstream generated_script;
 
-  generated_script
-      << "var audio = document.createElement(\'audio\');"
-      << "audio.session = new MediaSession();";
-
   if (!metadata.has_value()) {
-    generated_script << "audio.session.metadata = null;";
+    generated_script << "window.navigator.mediaSession.metadata = null;";
     return generated_script.str();
   }
 
   generated_script
-      << "audio.session.metadata = new MediaMetadata({"
+      << "window.navigator.mediaSession.metadata = new MediaMetadata({"
       << "title: \"" << metadata->title << "\", "
       << "artist: \"" << metadata->artist << "\", "
       << "album: \"" << metadata->album << "\", "
@@ -95,8 +91,9 @@ void PrintTo(const base::Optional<MediaMetadata>& metadata, std::ostream* os) {
 
 class MockBrowserMediaSessionManager : public BrowserMediaSessionManager {
  public:
-  explicit MockBrowserMediaSessionManager(RenderFrameHost* render_frame_host)
-      : BrowserMediaSessionManager(render_frame_host) {}
+  explicit MockBrowserMediaSessionManager(RenderFrameHost* render_frame_host,
+                                          WebContentsImpl* contents)
+      : BrowserMediaSessionManager(render_frame_host, contents) {}
 
   MOCK_METHOD2(OnActiveate, void(int session_id, int request_id));
   MOCK_METHOD2(OnDeactiveate, void(int session_id, int request_id));
@@ -115,10 +112,11 @@ class BrowserMediaSessionManagerBrowserTest : public ContentBrowserTest {
  protected:
   void SetUpOnMainThread() override {
     ContentBrowserTest::SetUpOnMainThread();
-    web_contents_ = shell()->web_contents();
+    web_contents_ = static_cast<WebContentsImpl*>(shell()->web_contents());
 
     std::unique_ptr<MockBrowserMediaSessionManager> manager(
-        new MockBrowserMediaSessionManager(web_contents_->GetMainFrame()));
+        new MockBrowserMediaSessionManager(
+            web_contents_->GetMainFrame(), web_contents_));
     browser_media_session_manager_ = manager.get();
     MediaWebContentsObserverAndroid::FromWebContents(web_contents_)
         ->SetMediaSessionManagerForTest(
@@ -137,7 +135,7 @@ class BrowserMediaSessionManagerBrowserTest : public ContentBrowserTest {
         switches::kEnableBlinkFeatures, "MediaSession");
   }
 
-  WebContents* web_contents_;
+  WebContentsImpl* web_contents_;
   MockBrowserMediaSessionManager* browser_media_session_manager_;
   scoped_refptr<MessageLoopRunner> message_loop_runner_;
 };