Add the necessary plumbing mechanisms to ensure proper WebGL support inside the <browser> tag, whic…

ppapi/thunk/ppb_graphics_3d_trusted_thunk.cc

Index: ppapi/thunk/ppb_graphics_3d_trusted_thunk.cc
diff --git a/ppapi/thunk/ppb_graphics_3d_trusted_thunk.cc b/ppapi/thunk/ppb_graphics_3d_trusted_thunk.cc
index 48f6ed1d4d62739215573a00d4f41e8c90465ce0..906b14ca67217e4ca221558fea7f0e8db5e9cccb 100644
--- a/ppapi/thunk/ppb_graphics_3d_trusted_thunk.cc
+++ b/ppapi/thunk/ppb_graphics_3d_trusted_thunk.cc
@@ -26,8 +26,17 @@ PP_Resource CreateRaw(PP_Instance instance,
   EnterResourceCreation enter(instance);
   if (enter.failed())
     return 0;
+
+  PPB_Graphics3D_API* share_api = NULL;
+  if (share_context) {
+    EnterResourceNoLock<PPB_Graphics3D_API> enter_share(instance, true);
+    if (enter_share.failed())
+      return 0;
+    share_api = enter_share.object();
+  }
+
   return enter.functions()->CreateGraphics3DRaw(
-      instance, share_context, attrib_list);
+      instance, share_api, attrib_list);
 }
 
 PP_Bool InitCommandBuffer(PP_Resource context) {