[Chromecast] ClearKey test

Add ClearKey test. ClearKey is handled in renderer process. It should be
supported on all the cast builds.

Bug: internal b/119043784
Test: CQ
Change-Id: I736cb4a6e863d3d92a5c31ab259624b395f550d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2155246
Commit-Queue: Yuchen Liu <yucliu@chromium.org>
Commit-Queue: Sean Topping <seantopping@chromium.org>
Auto-Submit: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Sean Topping <seantopping@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760214}

chromecast/browser/test/cast_navigation_browsertest.cc

@@ -18,6 +18,9 @@ namespace {
 const char kEnded[] = "ENDED";
 const char kError[] = "ERROR";
 const char kFailed[] = "FAILED";
+
+const char kClearKeyKeySystem[] = "org.w3.clearkey";
+const char kWebMAudioOnly[] = "audio/webm; codecs=\"vorbis\"";
 }
 
 class CastNavigationBrowserTest : public CastBrowserTest {
@@ -38,6 +41,17 @@ class CastNavigationBrowserTest : public CastBrowserTest {
   void PlayVideo(const std::string& media_file) {
     PlayMedia("video", media_file);
   }
+  void PlayEncryptedMedia(const std::string& key_system,
+                          const std::string& media_type,
+                          const std::string& media_file) {
+    base::StringPairs query_params;
+    query_params.emplace_back("mediaFile", media_file);
+    query_params.emplace_back("mediaType", media_type);
+    query_params.emplace_back("keySystem", key_system);
+    query_params.emplace_back("useMSE", "1");
+
+    RunMediaTestPage("eme_player.html", query_params, kEnded);
+  }
 
  private:
   void PlayMedia(const std::string& tag, const std::string& media_file) {
@@ -89,5 +103,9 @@ IN_PROC_BROWSER_TEST_F(CastNavigationBrowserTest, DISABLED_VideoPlaybackMp4) {
 }
 #endif
 
+IN_PROC_BROWSER_TEST_F(CastNavigationBrowserTest, ClearKeySupport) {
+  PlayEncryptedMedia(kClearKeyKeySystem, kWebMAudioOnly, "bear-a_enc-a.webm");
+}
+
 }  // namespace shell
 }  // namespace chromecast