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

content/renderer/media/webrtc/media_stream_remote_video_source_unittest.cc

 // Copyright 2014 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 "content/renderer/media/webrtc/media_stream_remote_video_source.h"
 
 #include <utility>
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 29 matching lines @@
   MediaStreamRemoteVideoSourceTest()
       : child_process_(new ChildProcess()),
         mock_factory_(new MockPeerConnectionDependencyFactory()),
         webrtc_video_track_(MockWebRtcVideoTrack::Create("test")),
         remote_source_(new MediaStreamRemoteVideoSourceUnderTest(
             std::unique_ptr<TrackObserver>(
                 new TrackObserver(base::ThreadTaskRunnerHandle::Get(),
                                   webrtc_video_track_.get())))),
         number_of_successful_constraints_applied_(0),
         number_of_failed_constraints_applied_(0) {
-    webkit_source_.initialize(base::UTF8ToUTF16("dummy_source_id"),
+    webkit_source_.initialize(blink::WebString::fromASCII("dummy_source_id"),
                               blink::WebMediaStreamSource::TypeVideo,
-                              base::UTF8ToUTF16("dummy_source_name"),
+                              blink::WebString::fromASCII("dummy_source_name"),
                               true /* remote */);
     webkit_source_.setExtraData(remote_source_);
   }
 
   void TearDown() override {
     remote_source_->OnSourceTerminated();
     webkit_source_.reset();
     blink::WebHeap::collectAllGarbageForTesting();
   }
 
@@ skipping 86 matching lines @@
   StopWebRtcTrack();
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateEnded,
             webkit_source().getReadyState());
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateEnded, sink.state());
 
   track->RemoveSink(&sink);
 }
 
 }  // namespace content