Revert 253259 "Move ContextProvider binding to inside GpuVideoAc..."
Broke 100+ WebKit layout tests.
> Move ContextProvider binding to inside GpuVideoAcceleratorFactory
>
> Bind the ContextProvider inside the GpuVideoAcceleratorFactory itself, so the
> Factory can decide appropriately what to do in casae of binding failure.
>
> Also: replace references to RendererGpuVideoAcceleratorFactory with references
> to its superclass, GpuVideoAcceleratorFactory.
>
> BUG=345424
> TEST=local build on desktop Linux
> R=avi@chromium.org, fischman@chromium.org
>
> Review URL: https://codereview.chromium.org/
171773014
TBR=sheu@google.com
Review URL: https://codereview.chromium.org/
176923018
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253326 0039d316-1c4b-4281-b951-d872f2087c98