Move WebMediaPlayerImpl and its dependencies to media/blink.

media/blink/texttrack_impl.h

Index: media/blink/texttrack_impl.h
diff --git a/content/renderer/media/texttrack_impl.h b/media/blink/texttrack_impl.h
similarity index 87%
rename from content/renderer/media/texttrack_impl.h
rename to media/blink/texttrack_impl.h
index 436d4eab0e0f5e3bc039652fe5ba32a95d10c54e..1d85bde72eff388ffd33989f36b5074f280765de 100644
--- a/content/renderer/media/texttrack_impl.h
+++ b/media/blink/texttrack_impl.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_RENDERER_MEDIA_TEXTTRACK_IMPL_H_
-#define CONTENT_RENDERER_MEDIA_TEXTTRACK_IMPL_H_
+#ifndef MEDIA_BLINK_TEXTTRACK_IMPL_H_
+#define MEDIA_BLINK_TEXTTRACK_IMPL_H_
 
 #include <string>
 
@@ -20,11 +20,11 @@ class WebInbandTextTrackClient;
 class WebMediaPlayerClient;
 }
 
-namespace content {
+namespace media {
 
 class WebInbandTextTrackImpl;
 
-class TextTrackImpl : public media::TextTrack {
+class TextTrackImpl : public TextTrack {
  public:
   // Constructor assumes ownership of the |text_track| object.
   TextTrackImpl(const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
@@ -56,6 +56,6 @@ class TextTrackImpl : public media::TextTrack {
   DISALLOW_COPY_AND_ASSIGN(TextTrackImpl);
 };
 
-}  // namespace content
+}  // namespace media
 
-#endif  // CONTENT_RENDERER_MEDIA_TEXTTRACK_IMPL_H_
+#endif  // MEDIA_BLINK_TEXTTRACK_IMPL_H_