gpu: Report time spent performing async texture uploads.

ui/gl/async_pixel_transfer_delegate.h

Index: ui/gl/async_pixel_transfer_delegate.h
diff --git a/ui/gl/async_pixel_transfer_delegate.h b/ui/gl/async_pixel_transfer_delegate.h
index 6448cc9bf8d1764d058f70db2055eba4e005ffb3..d07a77da88ec895ff3e41a2bf75c7cad45b53513 100644
--- a/ui/gl/async_pixel_transfer_delegate.h
+++ b/ui/gl/async_pixel_transfer_delegate.h
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/time.h"
 #include "build/build_config.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_export.h"
@@ -101,6 +102,9 @@ class GL_EXPORT AsyncPixelTransferDelegate {
       const AsyncTexSubImage2DParams& tex_params,
       const AsyncMemoryParams& mem_params) = 0;
 
+  virtual uint32 GetTextureUploadCount() = 0;
+  virtual base::TimeDelta GetTotalTextureUploadTime() = 0;
+
  protected:
   AsyncPixelTransferDelegate() {}
   // For testing, as returning scoped_ptr wouldn't work with MOCK_METHOD.