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

ppapi/thunk/resource_creation_api.h

Index: ppapi/thunk/resource_creation_api.h
diff --git a/ppapi/thunk/resource_creation_api.h b/ppapi/thunk/resource_creation_api.h
index 42ab2672b5ea7ff854658ff247a776b5d104cc91..7f982810a8da851e3d8044caff5a78793a10bbc6 100644
--- a/ppapi/thunk/resource_creation_api.h
+++ b/ppapi/thunk/resource_creation_api.h
@@ -33,6 +33,8 @@ struct PPB_URLRequestInfo_Data;
 
 namespace thunk {
 
+class PPB_Graphics3D_API;
+
 // A functional API for creating resource types. Separating out the creation
 // functions here allows us to implement most resources as a pure "resource
 // API", meaning all calls are routed on a per-resource-object basis. The
@@ -110,10 +112,10 @@ class ResourceCreationAPI {
                                        const PP_Size& size,
                                        PP_Bool is_always_opaque) = 0;
   virtual PP_Resource CreateGraphics3D(PP_Instance instance,
-                                       PP_Resource share_context,
+                                       PPB_Graphics3D_API* share_context,
                                        const int32_t* attrib_list) = 0;
   virtual PP_Resource CreateGraphics3DRaw(PP_Instance instance,
-                                          PP_Resource share_context,
+                                          PPB_Graphics3D_API* share_context,
                                           const int32_t* attrib_list) = 0;
   virtual PP_Resource CreateHostResolverPrivate(PP_Instance instance) = 0;
   virtual PP_Resource CreateImageData(PP_Instance instance,