gpu: Avoid detaching images with glTexSubImage2D

gpu/command_buffer/service/gles2_cmd_decoder_mock.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_mock.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_mock.h b/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
index 35ff4c13125cf01e566637857569c7cf827ae8a0..c58405bb2e792223fc0e51f4634e1e798cef9f3d 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_mock.h
@@ -101,9 +101,8 @@ class MockGLES2Decoder : public GLES2Decoder {
                                          uint32* service_texture_id));
   MOCK_METHOD0(GetContextLostReason, error::ContextLostReason());
   MOCK_CONST_METHOD1(GetCommandName, const char*(unsigned int command_id));
-  MOCK_METHOD10(ClearLevel, bool(
-      unsigned service_id,
-      unsigned bind_target,
+  MOCK_METHOD9(ClearLevel, bool(
+      Texture* texture,
       unsigned target,
       int level,
       unsigned internal_format,