Introduce WebMediaSession

third_party/WebKit/Source/modules/mediasession/MediaSessionError.cpp

Index: third_party/WebKit/Source/modules/mediasession/MediaSessionError.cpp
diff --git a/third_party/WebKit/Source/modules/mediasession/MediaSessionError.cpp b/third_party/WebKit/Source/modules/mediasession/MediaSessionError.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..af6b93d48ba6227f1a063d6e3c545b8428362c55
--- /dev/null
+++ b/third_party/WebKit/Source/modules/mediasession/MediaSessionError.cpp
@@ -0,0 +1,24 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "modules/mediasession/MediaSessionError.h"
+
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+
+namespace blink {
+
+// static
+v8::Local<v8::Value> MediaSessionError::take(ScriptPromiseResolver* resolver, const WebMediaSessionError& webError)
+{
+    v8::Isolate* isolate = resolver->scriptState()->isolate();
+
+    if (webError.errorType == WebMediaSessionError::ErrorTypeActivate)

[philipj_slow, 2015/10/07 14:37:12]

Maybe just assert this so that there's just one error below?

[davve, 2015/10/08 09:17:35]

Done.

+        return v8::Exception::TypeError(v8String(isolate, "The media session activation failed."));

[mlamouri (slow - plz ping), 2015/10/07 14:19:31]

I will not block this CL for that but I'm still against using TypeError. Proof
that it's not even used much is that you had to fix a bug in
CallbackPromiseAdapter to allow it to work in Blink.

[davve, 2015/10/08 09:17:35]

Point well taken. I'll make it a priority to follow up on this later.

+
+    ASSERT_NOT_REACHED();
+    return v8::Exception::Error(v8String(isolate, "An unknown error occurred."));
+}
+
+} // namespace blink