Merge 195349 "Reland "gpu: Fix Vivante's "hisilicon" GPUs""

Merge 195349 "Reland "gpu: Fix Vivante's "hisilicon" GPUs""

> Reland "gpu: Fix Vivante's "hisilicon" GPUs"
> 
> This fixes "Hisilicon" GPUs, which is an instance of a
> Vivante's GPU design. This involves enabling virtual
> contexts, since they don't support share-groups, and further
> adds a work-around for switching surfaces. Without the work-
> around the view surface "inherits" the size of the last
> bound surface (which for Chrome tends to be a 1x1 pbuffer)
> resulting in a black screen. The following steps "repair"
> the view surface every time it is made current:
> 
> - Make it current.
> - Bind the default frame-buffer.
> - Make it not current.
> - Destroy/recreate it from the native handle.
> - Make it current again.
> 
> NOTE: The "Recreate" function is added to surface because
> the Destroy/Initialize may be intercepted or modified by
> wrapper surface classes. Recreate is similar to resize,
> which after being forwarded by a wrapper can call
> Destroy/Initialize on the 'real' surface.
> 
> BUG=179250
> NOTRY=true
> 
> No-try, as all the relevant bots are already green.
> 
> Review URL: https://chromiumcodereview.appspot.com/13852023

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=195905

[epenner, 2013-04-23 21:59:16]

Committed patchset #1 manually as r195905.