Fix classes that have too many virtuals for inline constructors.

media/blink/mock_webframeclient.cc

Index: media/blink/mock_webframeclient.cc
diff --git a/media/video/jpeg_decode_accelerator.cc b/media/blink/mock_webframeclient.cc
similarity index 67%
copy from media/video/jpeg_decode_accelerator.cc
copy to media/blink/mock_webframeclient.cc
index 035c32167b67684ddc11c4b7654b014b52f16523..fbfde09c522614415285527c64e5ab875bf7b33c 100644
--- a/media/video/jpeg_decode_accelerator.cc
+++ b/media/blink/mock_webframeclient.cc
@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/video/jpeg_decode_accelerator.h"
+#include "media/blink/mock_webframeclient.h"
 
 namespace media {
 
-JpegDecodeAccelerator::~JpegDecodeAccelerator() {
-}
+MockWebFrameClient::MockWebFrameClient() = default;
 
 }  // namespace media