MediaRecorder: correct MIME type parsing

third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp

Index: third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp
diff --git a/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp b/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp
index 792a4d1012f26befc690046e62ef4dc29f53dda1..c8c95f61701f3a15969298de06376acc9bd521e3 100644
--- a/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp
+++ b/third_party/WebKit/Source/modules/mediarecorder/MediaRecorder.cpp
@@ -14,6 +14,7 @@
 #include "modules/EventTargetModules.h"
 #include "modules/mediarecorder/BlobEvent.h"
 #include "modules/mediarecorder/MediaRecorderErrorEvent.h"
+#include "platform/ContentType.h"
 #include "platform/NotImplemented.h"
 #include "platform/blob/BlobData.h"
 #include "public/platform/Platform.h"
@@ -80,7 +81,8 @@ MediaRecorder::MediaRecorder(ExecutionContext* context, MediaStream* stream, con
         exceptionState.throwDOMException(NotSupportedError, "No MediaRecorder handler can be created.");
         return;
     }
-    if (!m_recorderHandler->initialize(this, stream->descriptor(), m_mimeType)) {
+    ContentType contentType(m_mimeType);
+    if (!m_recorderHandler->initialize(this, stream->descriptor(), contentType.type(), contentType.parameter("codecs"))) {
         exceptionState.throwDOMException(NotSupportedError, "Failed to initialize native MediaRecorder, the type provided " + m_mimeType + "is unsupported." );
         return;
     }
@@ -173,7 +175,8 @@ bool MediaRecorder::isTypeSupported(const String& type)
     // specified MIME type. Recording may still fail if sufficient resources are
     // not available to support the concrete media encoding.
     // [1] https://w3c.github.io/mediacapture-record/MediaRecorder.html#methods
-    return handler->canSupportMimeType(type);
+    ContentType contentType(type);
+    return handler->canSupportMimeType(contentType.type(), contentType.parameter("codecs"));
 }
 
 const AtomicString& MediaRecorder::interfaceName() const