gpu: Add CHROMIUM_copy_image extension.

cc/test/test_gles2_interface.cc

Index: cc/test/test_gles2_interface.cc
diff --git a/cc/test/test_gles2_interface.cc b/cc/test/test_gles2_interface.cc
index 3c94bac60c8b14b81988e55c360090e798cd1339..2f9853bdb6a076e3218fa7f00a33b01ffb10c07f 100644
--- a/cc/test/test_gles2_interface.cc
+++ b/cc/test/test_gles2_interface.cc
@@ -297,6 +297,21 @@ void TestGLES2Interface::ReleaseTexImage2DCHROMIUM(GLenum target,
   test_context_->releaseTexImage2DCHROMIUM(target, image_id);
 }
 
+void TestGLES2Interface::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) {
+  test_context_->copyImageSubDataCHROMIUM(source_image_id, dest_texture_id,
+                                          xoffset, yoffset, x, y, width, height,
+                                          in_fence_id, out_fence_id);
+}
+
 void* TestGLES2Interface::MapBufferCHROMIUM(GLuint target, GLenum access) {
   return test_context_->mapBufferCHROMIUM(target, access);
 }