Mac h264: Plug GL program leak

ui/gl/gl_image_io_surface.h

Index: ui/gl/gl_image_io_surface.h
diff --git a/ui/gl/gl_image_io_surface.h b/ui/gl/gl_image_io_surface.h
index d17d9eb9d0084349456bf074bb057f21e874ddca..7b68a96b6f54ac7c718de1662a80a2079440b4e2 100644
--- a/ui/gl/gl_image_io_surface.h
+++ b/ui/gl/gl_image_io_surface.h
@@ -69,6 +69,8 @@ class GL_EXPORT GLImageIOSurface : public GLImage {
   ~GLImageIOSurface() override;
 
  private:
+  class RGBConverter;
+
   const gfx::Size size_;
   const unsigned internalformat_;
   gfx::BufferFormat format_;
@@ -77,13 +79,9 @@ class GL_EXPORT GLImageIOSurface : public GLImage {
   gfx::GenericSharedMemoryId io_surface_id_;
   base::ThreadChecker thread_checker_;
 
-  // GL state to support 420v IOSurface conversion to RGB.
-  unsigned framebuffer_ = 0;
-  unsigned vertex_shader_ = 0;
-  unsigned fragment_shader_ = 0;
-  unsigned program_ = 0;
-  int size_location_ = -1;
-  unsigned vertex_buffer_ = 0;
+  // GL state to support 420v IOSurface conversion to RGB. This is retained
+  // to avoid re-creating the necessary GL programs every frame.
+  scoped_refptr<RGBConverter> rgb_converter_;
 
   DISALLOW_COPY_AND_ASSIGN(GLImageIOSurface);
 };