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

content/renderer/media/media_stream_video_source_unittest.cc

Index: content/renderer/media/media_stream_video_source_unittest.cc
diff --git a/content/renderer/media/media_stream_video_source_unittest.cc b/content/renderer/media/media_stream_video_source_unittest.cc
index dfeea8edf4ba6755c0ecca5759573121af102559..9f21b46045d069bae666ab48c1a1b05f12bf9847 100644
--- a/content/renderer/media/media_stream_video_source_unittest.cc
+++ b/content/renderer/media/media_stream_video_source_unittest.cc
@@ -50,9 +50,9 @@ class MediaStreamVideoSourceTest : public ::testing::Test {
     formats.push_back(media::VideoCaptureFormat(
         gfx::Size(320, 240), 30, media::PIXEL_FORMAT_I420));
     mock_source_->SetSupportedFormats(formats);
-    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"),
                               false /* remote */);
     webkit_source_.setExtraData(mock_source_);
   }