Refactor VP9 codec string parsing

chrome/browser/media/encrypted_media_browsertest.cc

Index: chrome/browser/media/encrypted_media_browsertest.cc
diff --git a/chrome/browser/media/encrypted_media_browsertest.cc b/chrome/browser/media/encrypted_media_browsertest.cc
index e76f0d8c342d5e70d3d22dd6668d0576d30e5793..d3ece5603c5aad24ebe88bec7d28226f80a08e8c 100644
--- a/chrome/browser/media/encrypted_media_browsertest.cc
+++ b/chrome/browser/media/encrypted_media_browsertest.cc
@@ -19,6 +19,7 @@
 #include "chrome/test/base/test_launcher_utils.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
+#include "media/base/media_switches.h"
 #include "ppapi/features/features.h"
 #include "testing/gtest/include/gtest/gtest-spi.h"
 
@@ -66,6 +67,8 @@ const char kWebMVP9VideoOnly[] = "video/webm; codecs=\"vp9\"";
 #if defined(USE_PROPRIETARY_CODECS)
 const char kMP4AudioOnly[] = "audio/mp4; codecs=\"mp4a.40.2\"";
 const char kMP4VideoOnly[] = "video/mp4; codecs=\"avc1.4D000C\"";
+const char kMP4VideoVp9Only[] =
+    "video/mp4; codecs=\"vp09.00.01.08.02.01.01.00\"";
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
 // Sessions to load.
@@ -242,6 +245,7 @@ class EncryptedMediaTestBase : public MediaBrowserTest {
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(
         switches::kDisableGestureRequirementForMediaPlayback);
+    command_line->AppendSwitch(switches::kEnableVp9InMp4);
   }
 
 #if BUILDFLAG(ENABLE_PEPPER_CDMS)
@@ -549,6 +553,15 @@ IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_AudioOnly_MP4) {
   TestSimplePlayback("bear-640x360-a_frag-cenc.mp4", kMP4AudioOnly);
 }
 
+IN_PROC_BROWSER_TEST_P(EncryptedMediaTest, Playback_VideoOnly_MP4_VP9) {
+  // MP4 without MSE is not support yet, http://crbug.com/170793.
+  if (CurrentSourceType() != MSE) {
+    DVLOG(0) << "Skipping test; Can only play MP4 encrypted streams by MSE.";
+    return;
+  }
+  TestSimplePlayback("bear-320x240-v_frag-vp9-cenc.mp4", kMP4VideoVp9Only);
+}
+
 IN_PROC_BROWSER_TEST_P(EncryptedMediaTest,
                        Playback_EncryptedVideo_MP4_ClearAudio_WEBM) {
   // MP4 without MSE is not support yet, http://crbug.com/170793.