Use explicit WebString conversion methods in content/renderer/media (unittests)

content/renderer/media/media_stream_video_renderer_sink_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/macros.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/child/child_process.h"
 #include "content/renderer/media/media_stream_video_renderer_sink.h"
@@ skipping 18 matching lines @@
 
 ACTION_P(RunClosure, closure) {
   closure.Run();
 }
 
 class MediaStreamVideoRendererSinkTest : public testing::Test {
  public:
   MediaStreamVideoRendererSinkTest()
       : child_process_(new ChildProcess()),
         mock_source_(new MockMediaStreamVideoSource(false)) {
-    blink_source_.initialize(base::UTF8ToUTF16("dummy_source_id"),
+    blink_source_.initialize(blink::WebString::fromASCII("dummy_source_id"),
                              blink::WebMediaStreamSource::TypeVideo,
-                             base::UTF8ToUTF16("dummy_source_name"),
+                             blink::WebString::fromASCII("dummy_source_name"),
                              false /* remote */);
     blink_source_.setExtraData(mock_source_);
     blink::WebMediaConstraints constraints;
     constraints.initialize();
     blink_track_ = MediaStreamVideoTrack::CreateVideoTrack(
         mock_source_, constraints, MediaStreamSource::ConstraintsCallback(),
         true);
     mock_source_->StartMockedSource();
     base::RunLoop().RunUntilIdle();
 
@@ skipping 169 matching lines @@
   const scoped_refptr<media::VideoFrame> video_frame =
       media::VideoFrame::CreateFrame(media::PIXEL_FORMAT_YV12A, kSize,
                                      gfx::Rect(kSize), kSize, kTimestamp);
   OnVideoFrame(video_frame);
   base::RunLoop().RunUntilIdle();
 
   media_stream_video_renderer_sink_->Stop();
 }
 
 }  // namespace content