Fix addDummyTextureNoRenderTarget workaround memory leak Add dummy attachment in FramebufferD3D as a private member and release the dummy attchment in destory of FramebufferD3D. BUG=angleproject:2282 TEST=FramebufferTest_ES31.RenderingLimitToDefaultFBOSizeWithNoAttachments/ES3_1_D3D11 TEST=dEQP-GLES31.functional.fbo.no_attachments.* Change-Id: I3a17282ef132185fbc25f4076f624e53661d4b20 Reviewed-on: https://chromium-review.googlesource.com/831847 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>