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

content/renderer/pepper/pepper_platform_context_3d.cc

Index: content/renderer/pepper/pepper_platform_context_3d.cc
===================================================================
--- content/renderer/pepper/pepper_platform_context_3d.cc	(revision 255442)
+++ content/renderer/pepper/pepper_platform_context_3d.cc	(working copy)
@@ -104,6 +104,7 @@
   if (!command_buffer_->ProduceFrontBuffer(mailbox))
     return false;
   mailbox_ = mailbox;
+  sync_point_ = command_buffer_->InsertSyncPoint();
 
   command_buffer_->SetChannelErrorCallback(
       base::Bind(&PlatformContext3D::OnContextLost,
@@ -115,10 +116,17 @@
   return true;
 }
 
-void PlatformContext3D::GetBackingMailbox(gpu::Mailbox* mailbox) {
+void PlatformContext3D::GetBackingMailbox(gpu::Mailbox* mailbox,
+                                          uint32* sync_point) {
   *mailbox = mailbox_;
+  *sync_point = sync_point_;
 }
 
+void PlatformContext3D::InsertSyncPointForBackingMailbox() {
+  DCHECK(command_buffer_);
+  sync_point_ = command_buffer_->InsertSyncPoint();
+}
+
 bool PlatformContext3D::IsOpaque() {
   DCHECK(command_buffer_);
   return !has_alpha_;