Add ScriptForbiddenScope to weak callbacks of DOM wrappers

Source/core/dom/ScriptForbiddenScope.cpp

Index: Source/core/dom/ScriptForbiddenScope.cpp
diff --git a/Source/core/dom/ScriptForbiddenScope.cpp b/Source/core/dom/ScriptForbiddenScope.cpp
index 81540dcb6f3ea68c3cd0d9ca2190b87b46401610..c7e164cd548c4393cff14b40a5dd82f19903c301 100644
--- a/Source/core/dom/ScriptForbiddenScope.cpp
+++ b/Source/core/dom/ScriptForbiddenScope.cpp
@@ -16,14 +16,15 @@ static unsigned s_scriptForbiddenCount = 0;
 
 ScriptForbiddenScope::ScriptForbiddenScope()
 {
-    ASSERT(isMainThread());
-    ++s_scriptForbiddenCount;
+    // FIXME: Support non-main threads.
+    if (isMainThread())

[haraken, 2014/07/03 01:56:19]

Since ScriptWrappable and DOMWrapperMap are used in workers as well, I removed
the ASSERT(isMainThread()). I'll consider supporting non-main threads in a
follow-up.

+        ++s_scriptForbiddenCount;
 }
 
 ScriptForbiddenScope::~ScriptForbiddenScope()
 {
-    ASSERT(isMainThread());
-    --s_scriptForbiddenCount;
+    if (isMainThread())
+        --s_scriptForbiddenCount;
 }
 
 bool ScriptForbiddenScope::isScriptForbidden()