Add DVLOG_IS_ON() in preparation for adding dvlog_always_on in chromium project.

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

 /*
  * Copyright (C) 2008, 2009, 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 43 matching lines @@
          next_status == Lifecycle::kFrameIsDetached);
 
   if (lifecycle_ != Lifecycle::kContextIsInitialized)
     return;
 
   if (next_status == Lifecycle::kGlobalObjectIsDetached &&
       !global_proxy_.IsEmpty()) {
     global_proxy_.Get().SetWrapperClassId(0);
     V8DOMWrapper::ClearNativeInfo(GetIsolate(),
                                   global_proxy_.NewLocal(GetIsolate()));
-#if DCHECK_IS_ON()
+#if DCHECK_IS_ON() || DVLOG_IS_ON()
     DidDetachGlobalObject();
 #endif
   }
 
   if (next_status == Lifecycle::kFrameIsDetached) {
     // The context's frame is detached from the DOM, so there shouldn't be a
     // strong reference to the context.
     global_proxy_.SetPhantom();
   }
 
@@ skipping 26 matching lines @@
   v8::Local<v8::Object> global_proxy =
       v8::Context::NewRemoteContext(GetIsolate(), global_template,
                                     global_proxy_.NewLocal(GetIsolate()))
           .ToLocalChecked();
   if (global_proxy_.IsEmpty())
     global_proxy_.Set(GetIsolate(), global_proxy);
   else
     DCHECK(global_proxy_.Get() == global_proxy);
   CHECK(!global_proxy_.IsEmpty());
 
-#if DCHECK_IS_ON()
+#if DCHECK_IS_ON() || DVLOG_IS_ON()
   DidAttachGlobalObject();
 #endif
 
   DCHECK(lifecycle_ == Lifecycle::kContextIsUninitialized ||
          lifecycle_ == Lifecycle::kGlobalObjectIsDetached);
   lifecycle_ = Lifecycle::kContextIsInitialized;
 }
 
 void RemoteWindowProxy::SetupWindowPrototypeChain() {
   // Associate the window wrapper object and its prototype chain with the
@@ skipping 11 matching lines @@
 
   // The global object, aka window wrapper object.
   v8::Local<v8::Object> window_wrapper =
       global_proxy->GetPrototype().As<v8::Object>();
   v8::Local<v8::Object> associated_wrapper =
       AssociateWithWrapper(window, wrapper_type_info, window_wrapper);
   DCHECK(associated_wrapper == window_wrapper);
 }
 
 }  // namespace blink