Initial implementation of bindings and basic classes for worklets.

third_party/WebKit/Source/bindings/core/v8/ActiveDOMCallback.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ActiveDOMCallback.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ActiveDOMCallback.cpp b/third_party/WebKit/Source/bindings/core/v8/ActiveDOMCallback.cpp
index ce03d62459672688d6ffe6ece199bad01441af7c..94d4a4dcfd285ca4ce81b96d63edc17cedb57b4f 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ActiveDOMCallback.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ActiveDOMCallback.cpp
@@ -30,6 +30,7 @@
 
 #include "bindings/core/v8/ActiveDOMCallback.h"
 
+#include "bindings/core/v8/GlobalScopeScriptController.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/workers/WorkerGlobalScope.h"
@@ -55,7 +56,7 @@ bool ActiveDOMCallback::isScriptControllerTerminating() const
 {
     ExecutionContext* context = executionContext();
     if (context && context->isWorkerGlobalScope()) {
-        WorkerScriptController* scriptController = toWorkerGlobalScope(context)->script();
+        GlobalScopeScriptController* scriptController = toWorkerGlobalScope(context)->script();

[kinuko, 2015/12/24 04:45:51]

Here we're checking isWorkerGlobalScope and doing toWorkerGlobalScope, I think
we want to stick to WorkerScriptController?  (Assuming we won't be supporting
APIs that use callback in worklets)

         if (!scriptController || scriptController->isExecutionForbidden() || scriptController->isExecutionTerminating())
             return true;
     }