GitLab

In transition to let RenderPass take responsibility to allocate
DrawQuads, Copy method from DQ is moved to RP.

In drawquad_unittest, no RenderPass is present, thus it takes advantage
of default copy constructor.

Follow 368403003.

BUG=344962

Review URL: https://codereview.chromium.org/380893004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282640 0039d316-1c4b-4281-b951-d872f2087c98