Add MediaError.message

content/renderer/media_capture_from_element/html_video_element_capturer_source_unittest.cc

 // 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 "base/bind.h"
 #include "base/memory/weak_ptr.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "content/renderer/media_capture_from_element/html_video_element_capturer_source.h"
 #include "media/base/limits.h"
@@ skipping 38 matching lines @@
                  blink::WebSetSinkIdCallbacks*) override {}
   bool HasVideo() const override { return true; }
   bool HasAudio() const override { return false; }
   blink::WebSize NaturalSize() const override { return blink::WebSize(16, 10); }
   bool Paused() const override { return false; }
   bool Seeking() const override { return false; }
   double Duration() const override { return 0.0; }
   double CurrentTime() const override { return 0.0; }
   NetworkState GetNetworkState() const override { return kNetworkStateEmpty; }
   ReadyState GetReadyState() const override { return kReadyStateHaveNothing; }
-  blink::WebString GetErrorMessage() override { return blink::WebString(); }
+  blink::WebString GetErrorMessage() const override {
+    return blink::WebString();
+  }
+
   bool DidLoadingProgress() override { return true; }
   bool HasSingleSecurityOrigin() const override { return true; }
   bool DidPassCORSAccessCheck() const override { return true; }
   double MediaTimeForTimeValue(double timeValue) const override { return 0.0; }
   unsigned DecodedFrameCount() const override { return 0; }
   unsigned DroppedFrameCount() const override { return 0; }
   unsigned CorruptedFrameCount() const override { return 0; }
   size_t AudioDecodedByteCount() const override { return 0; }
   size_t VideoDecodedByteCount() const override { return 0; }
 
@@ skipping 86 matching lines @@
       base::Bind(&HTMLVideoElementCapturerSourceTest::OnRunning,
                  base::Unretained(this)));
 
   run_loop.Run();
 
   html_video_capturer_->StopCapture();
   Mock::VerifyAndClearExpectations(this);
 }
 
 }  // namespace content