gpu: Add CHROMIUM_copy_image extension.

gpu/command_buffer/client/gles2_implementation_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_autogen.h b/gpu/command_buffer/client/gles2_implementation_autogen.h
index a5deb0ec59d0f49df9d9ddf91b35615f3134f47d..b5d20bad5a123909e925b491965d7cf3be829280 100644
--- a/gpu/command_buffer/client/gles2_implementation_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_autogen.h
@@ -1003,6 +1003,17 @@ void BindTexImage2DCHROMIUM(GLenum target,
 
 void ReleaseTexImage2DCHROMIUM(GLenum target, GLint imageId) override;
 
+void CopyImageSubDataCHROMIUM(GLint source_image_id,
+                              GLint dest_texture_id,
+                              GLint xoffset,
+                              GLint yoffset,
+                              GLint x,
+                              GLint y,
+                              GLsizei width,
+                              GLsizei height,
+                              GLint in_fence_id,
+                              GLint out_fence_id) override;
+
 void TraceBeginCHROMIUM(const char* category_name,
                         const char* trace_name) override;