Improve Ganesh helpers.

mojo/skia/ganesh_texture_surface.h

Index: mojo/skia/ganesh_texture_surface.h
diff --git a/mojo/skia/ganesh_texture_surface.h b/mojo/skia/ganesh_texture_surface.h
index cd3b05dc74f5458efa910f0cb84e73eb4cb5b872..296a8347f080a4c1b54f687e9390fda0fdd12c0e 100644
--- a/mojo/skia/ganesh_texture_surface.h
+++ b/mojo/skia/ganesh_texture_surface.h
@@ -7,12 +7,15 @@
 
 #include <memory>
 
-#include "mojo/gpu/gl_texture.h"
-#include "mojo/skia/ganesh_context.h"
+#include "base/macros.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkSurface.h"
 
 namespace mojo {
+class GLTexture;
+
+namespace skia {
+class GaneshContext;
 
 // This class represents an SkSurface backed by a GL texture, which is
 // appropriate for use with Ganesh.  This is useful for rendering Skia
@@ -32,11 +35,12 @@ class GaneshTextureSurface {
 
  private:
   std::unique_ptr<GLTexture> texture_;
-  skia::RefPtr<SkSurface> surface_;
+  ::skia::RefPtr<SkSurface> surface_;
 
   DISALLOW_COPY_AND_ASSIGN(GaneshTextureSurface);
 };
 
+}  // namespace skia
 }  // namespace mojo
 
 #endif  // MOJO_SKIA_GANESH_TEXTURE_SURFACE_H_