Enforce ScriptForbiddenScope and make it non-fatal.

Source/bindings/core/v8/V8ScriptRunner.cpp

Index: Source/bindings/core/v8/V8ScriptRunner.cpp
diff --git a/Source/bindings/core/v8/V8ScriptRunner.cpp b/Source/bindings/core/v8/V8ScriptRunner.cpp
index 4eb508e5149393ff45214aee112672112ea064cf..675f0cacb42b98b5b7f5e58a0deb9e73686a4cd3 100644
--- a/Source/bindings/core/v8/V8ScriptRunner.cpp
+++ b/Source/bindings/core/v8/V8ScriptRunner.cpp
@@ -36,6 +36,7 @@
 #include "core/fetch/CachedMetadata.h"
 #include "core/fetch/ScriptResource.h"
 #include "platform/TraceEvent.h"
+#include "wtf/OwnPtr.h"
 
 namespace blink {
 
@@ -175,7 +176,10 @@ v8::Local<v8::Value> V8ScriptRunner::runCompiledScript(v8::Handle<v8::Script> sc
     // Run the script and keep track of the current recursion depth.
     v8::Local<v8::Value> result;
     {
-        V8RecursionScope recursionScope(isolate);
+        OwnPtr<V8RecursionScope> recursionScope = V8RecursionScope::create(isolate);
+        if (!recursionScope)
+            return v8::Undefined(isolate);
+
         result = script->Run();
     }
 
@@ -220,7 +224,9 @@ v8::Local<v8::Value> V8ScriptRunner::callFunction(v8::Handle<v8::Function> funct
 
     RELEASE_ASSERT(!context->isIteratingOverObservers());
 
-    V8RecursionScope recursionScope(isolate);
+    OwnPtr<V8RecursionScope> recursionScope = V8RecursionScope::create(isolate);
+    if (!recursionScope)
+        return v8::Undefined(isolate);
     v8::Local<v8::Value> result = function->Call(receiver, argc, args);
     crashIfV8IsDead();
     return result;
@@ -273,7 +279,9 @@ v8::Local<v8::Object> V8ScriptRunner::instantiateObjectInDocument(v8::Isolate* i
 {
     TRACE_EVENT0("v8", "v8.newInstance");
     TRACE_EVENT_SCOPED_SAMPLING_STATE("v8", "V8Execution");
-    V8RecursionScope scope(isolate);
+    OwnPtr<V8RecursionScope> scope = V8RecursionScope::create(isolate);
+    if (!scope)
+        return v8::Local<v8::Object>();
     v8::Local<v8::Object> result = function->NewInstance(argc, argv);
     crashIfV8IsDead();
     return result;