Move WebMediaPlayerImpl and its dependencies to media/blink.

media/base/data_source.h

Index: media/base/data_source.h
diff --git a/media/base/data_source.h b/media/base/data_source.h
index e0b73738a7eb4d2ec5f5893f54fc0d432436735f..42566a9a13d5e4e226eb5d83ab78473b0fb7de96 100644
--- a/media/base/data_source.h
+++ b/media/base/data_source.h
@@ -15,7 +15,8 @@ class MEDIA_EXPORT DataSource {
  public:
   typedef base::Callback<void(int64, int64)> StatusCallback;
   typedef base::Callback<void(int)> ReadCB;
-  static const int kReadError;
+
+  enum { kReadError = -1 };
 
   DataSource();
   virtual ~DataSource();