Apply the Surface Texture transformation matrix during texture copy.

content/common/gpu/stream_texture_android.h

Index: content/common/gpu/stream_texture_android.h
diff --git a/content/common/gpu/stream_texture_android.h b/content/common/gpu/stream_texture_android.h
index a761206b2ac297fd24b43d1a70822422b8c3148a..a885818585d506633bbe9437ca7f84d34f98360c 100644
--- a/content/common/gpu/stream_texture_android.h
+++ b/content/common/gpu/stream_texture_android.h
@@ -12,6 +12,10 @@
 #include "ui/gl/android/surface_texture.h"
 #include "ui/gl/gl_image.h"
 
+namespace ui {
+class ScopedMakeCurrent;
+}
+
 namespace gfx {
 class Size;
 }
@@ -54,6 +58,11 @@ class StreamTexture : public gl::GLImage,
   // GpuCommandBufferStub::DestructionObserver implementation.
   void OnWillDestroyStub() override;
 
+  scoped_ptr<ui::ScopedMakeCurrent> MakeStubCurrent();
+  void DoUpdateTexImage();
+  bool DoCopyTexture(const gfx::Point& offset, const gfx::Rect& rect);
+
+  void UpdateTransformMatrix();
   // Called when a new frame is available for the SurfaceTexture.
   void OnFrameAvailable();
 
@@ -82,8 +91,16 @@ class StreamTexture : public gl::GLImage,
   GpuCommandBufferStub* owner_stub_;
   int32 route_id_;
   bool has_listener_;
+  bool matrix_modified_;
   uint32 texture_id_;
 
+  unsigned framebuffer_;
+  unsigned vertex_shader_;
+  unsigned fragment_shader_;
+  unsigned program_;
+  unsigned vertex_buffer_;
+  int u_xform_loc_;
+
   base::WeakPtrFactory<StreamTexture> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(StreamTexture);
 };