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

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195349 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 0 deletions

diff --git a/ui/gl/gl_context.h b/ui/gl/gl_context.h
index 7300cdb..7645a29 100644
--- a/ui/gl/gl_context.h
+++ b/ui/gl/gl_context.h
@@ -65,6 +65,10 @@ class GL_EXPORT GLContext : public base::RefCounted<GLContext> {
   // transitioning can cause corruption and hangs (OS X only).
   virtual void SetSafeToForceGpuSwitch();
 
+  // Indicate that the real context switches should recreate the surface
+  // (For an Android work-around only).
+  virtual void SetRecreateSurfaceOnMakeCurrent();
+
   // Returns whether the current context supports the named extension. The
   // context must be current.
   bool HasExtension(const char* name);