Introduce a lifecycle model to WindowProxy

third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.cpp b/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.cpp
index 0a4c895c3008d7594550702a91de0af4cee45bfa..d6b8c7977863adbfa61a6427341a07c00c80b8c6 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8BindingForTesting.cpp
@@ -79,9 +79,6 @@ V8TestingScope::~V8TestingScope() {
   // the isolate.  Otherwise, the leak detector complains.  Really mysterious
   // hack.
   v8::Function::New(context(), nullptr);
-
-  if (m_holder->document().frame())
-    getScriptState()->disposePerContextData();
 }
 
 }  // namespace blink