[ABANDONED] Enable V8 Promises

Source/bindings/v8/V8RecursionScope.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef V8RecursionScope_h
 #define V8RecursionScope_h
 
 #include "bindings/v8/V8PerIsolateData.h"
-#include "core/dom/ExecutionContext.h"
 #include "wtf/Noncopyable.h"
 
 namespace WebCore {
 
+class ExecutionContext;
+
 // C++ calls into script contexts which are "owned" by WebKit (created in a
 // process where WebKit.cpp initializes v8) must declare their type:
 //
 //   1. Calls into page/author script from a frame
 //   2. Calls into page/author script from a worker
 //   3. Calls into internal script (typically setup/teardown work)
 //
 // Debug-time checking of this is enforced via this class.
 //
 // Calls of type (1) should generally go through ScriptController, as inspector
 // instrumentation is needed. ScriptController allocates V8RecursionScope for you.
 // Calls of type (2) should always stack-allocate a V8RecursionScope in the same
 // block as the call into script. Calls of type (3) should stack allocate a
 // V8RecursionScope::MicrotaskSuppression -- this skips work that is spec'd to
 // happen at the end of the outer-most script stack frame of calls into page script:
 //
 // http://www.whatwg.org/specs/web-apps/current-work/#perform-a-microtask-checkpoint
 class V8RecursionScope {
     WTF_MAKE_NONCOPYABLE(V8RecursionScope);
 public:
     explicit V8RecursionScope(ExecutionContext* context)
-        : m_isDocumentContext(context && context->isDocument())
+        : m_context(context)
     {
         V8PerIsolateData::current()->incrementRecursionLevel();
     }
 
     ~V8RecursionScope()
     {
         if (!V8PerIsolateData::current()->decrementRecursionLevel())
             didLeaveScriptContext();
     }
 
@@ skipping 21 matching lines @@
         ~MicrotaskSuppression()
         {
 #ifndef NDEBUG
             V8PerIsolateData::current()->decrementInternalScriptRecursionLevel();
 #endif
         }
     };
 
 private:
     void didLeaveScriptContext();
+    bool isStopped();
 
-    bool m_isDocumentContext;
+    ExecutionContext* m_context;

[adamk, 2014/03/28 17:55:05]

Can you explain why it's safe to store the context here?

 };
 
 } // namespace WebCore
 
 #endif // V8RecursionScope_h