[Bindings] Create and use V8 context snapshots

third_party/WebKit/Source/platform/bindings/ScriptWrappableVisitor.cpp

Index: third_party/WebKit/Source/platform/bindings/ScriptWrappableVisitor.cpp
diff --git a/third_party/WebKit/Source/platform/bindings/ScriptWrappableVisitor.cpp b/third_party/WebKit/Source/platform/bindings/ScriptWrappableVisitor.cpp
index c384ee2b6d01f91718559fbf06869a8effd647a2..03830ac8c87658bdd729312876c4e0447e5f4bab 100644
--- a/third_party/WebKit/Source/platform/bindings/ScriptWrappableVisitor.cpp
+++ b/third_party/WebKit/Source/platform/bindings/ScriptWrappableVisitor.cpp
@@ -94,13 +94,14 @@ void ScriptWrappableVisitor::PerformCleanup() {
 
 void ScriptWrappableVisitor::ScheduleIdleLazyCleanup() {
   // Some threads (e.g. PPAPI thread) don't have a scheduler.
-  if (!Platform::Current()->CurrentThread()->Scheduler())
+  WebThread* current_thread = Platform::Current()->CurrentThread();

[Yuki, 2017/06/23 15:20:45]

Once CurrentThread() is implemented, we should revert this file.

[peria, 2017/06/27 09:52:37]

Done.

+  if (!current_thread || !current_thread->Scheduler())
     return;
 
   if (idle_cleanup_task_scheduled_)
     return;
 
-  Platform::Current()->CurrentThread()->Scheduler()->PostIdleTask(
+  current_thread->Scheduler()->PostIdleTask(
       BLINK_FROM_HERE, WTF::Bind(&ScriptWrappableVisitor::PerformLazyCleanup,
                                  WTF::Unretained(this)));
   idle_cleanup_task_scheduled_ = true;