Prepare WindowProxy for using v8::Context::NewRemoteContext().

third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h

Index: third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h b/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
index 6e6a394cf580647da90bcd15dc67c531c9f2e6e4..7e7fde4d558ba7f859856faf47a306013c66b1c4 100644
--- a/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
+++ b/third_party/WebKit/Source/bindings/core/v8/RemoteWindowProxy.h
@@ -32,12 +32,25 @@
 #define RemoteWindowProxy_h
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
+#include "bindings/core/v8/ScriptState.h"
+#include "bindings/core/v8/WindowProxy.h"
 #include "core/frame/RemoteFrame.h"
 #include "v8/include/v8.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
 // Subclass of WindowProxy that only handles RemoteFrame.
+// TODO(dcheng): This class currently duplicates a lot of logic from
+// LocalWindowPoxy:
+// - contextIfInitialized
+// - initialize
+// - disposeContext
+// - setupWindowPrototypeChain
+// - createContext
+// This is currently duplicated to make it easier to stage the switch to using
+// v8::RemoteContext::NewRemoteContext, and will be removed once the switch
+// is complete.
 class RemoteWindowProxy final : public WindowProxy {
  public:
   static RemoteWindowProxy* create(v8::Isolate* isolate,
@@ -47,17 +60,27 @@ class RemoteWindowProxy final : public WindowProxy {
     return new RemoteWindowProxy(isolate, frame, std::move(world));
   }
 
+  v8::Local<v8::Context> contextIfInitialized() const {
+    return m_scriptState ? m_scriptState->context() : v8::Local<v8::Context>();
+  }
+
  private:
   RemoteWindowProxy(v8::Isolate*, RemoteFrame&, RefPtr<DOMWrapperWorld>);
 
   void initialize() override;
   void disposeContext(GlobalDetachmentBehavior) override;
 
+  // Associates the window wrapper and its prototype chain with the native
+  // DOMWindow object. Also does some more Window-specific initialization.
+  void setupWindowPrototypeChain();
+
   // Creates a new v8::Context with the window wrapper object as the global
   // object (aka the inner global).  Note that the window wrapper and its
   // prototype chain do not get fully initialized yet, e.g. the window
   // wrapper is not yet associated with the native DOMWindow object.
   void createContext();
+
+  RefPtr<ScriptState> m_scriptState;
 };
 
 }  // namespace blink