Remove BLINK_ASSERT() and BLINK_ASSERT_NOT_REACHED() macros.

media/blink/mock_webframeclient.cc

Index: media/blink/mock_webframeclient.cc
diff --git a/media/blink/mock_webframeclient.cc b/media/blink/mock_webframeclient.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3200b7bce7e59b1e61f7877fb0439c3a18e4f71e
--- /dev/null
+++ b/media/blink/mock_webframeclient.cc
@@ -0,0 +1,18 @@
+// Copyright 2016 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 "media/blink/mock_webframeclient.h"
+
+#include "base/logging.h"
+
+namespace media {
+
+void MockWebFrameClient::checkIfAudioSinkExistsAndIsAuthorized(
+    const blink::WebString& sinkId,
+    const blink::WebSecurityOrigin& origin,
+    blink::WebSetSinkIdCallbacks* callbacks) {
+  NOTREACHED();
+}
+
+}  // namespace media