Merge 254840 "ppapi: Send sync point whenever the pepper texture..."

content/renderer/pepper/ppb_graphics_3d_impl.cc

Index: content/renderer/pepper/ppb_graphics_3d_impl.cc
===================================================================
--- content/renderer/pepper/ppb_graphics_3d_impl.cc	(revision 256299)
+++ content/renderer/pepper/ppb_graphics_3d_impl.cc	(working copy)
@@ -197,6 +197,10 @@
   if (gles2_impl())
     gles2_impl()->SwapBuffers();
 
+  // Since the backing texture has been updated, a new sync point should be
+  // inserted.
+  platform_context_->InsertSyncPointForBackingMailbox();
+
   if (bound_to_instance_) {
     // If we are bound to the instance, we need to ask the compositor
     // to commit our backing texture so that the graphics appears on the page.