Have Frame::tree() return a reference

Source/bindings/v8/custom/V8WindowCustom.cpp

 /*
  * Copyright (C) 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 370 matching lines @@
     if (!window)
         return;
 
     Frame* frame = window->frame();
     // window is detached from a frame.
     if (!frame)
         return;
 
     // Search sub-frames.
     AtomicString propName = toWebCoreAtomicString(name);
-    Frame* child = frame->tree()->scopedChild(propName);
+    Frame* child = frame->tree().scopedChild(propName);
     if (child) {
         v8SetReturnValueFast(info, child->domWindow(), window);
         return;
     }
 
     // Search IDL functions defined in the prototype
     if (!info.Holder()->GetRealNamedProperty(name).IsEmpty())
         return;
 
     // Search named items in the document.
@@ skipping 46 matching lines @@
         return false;
 
     // Notify the loader's client if the initial document has been accessed.
     if (target->loader()->stateMachine()->isDisplayingInitialEmptyDocument())
         target->loader()->didAccessInitialDocument();
 
     if (key->IsString()) {
         DEFINE_STATIC_LOCAL(AtomicString, nameOfProtoProperty, ("__proto__", AtomicString::ConstructFromLiteral));
 
         String name = toWebCoreString(key.As<v8::String>());
-        Frame* childFrame = target->tree()->scopedChild(name);
+        Frame* childFrame = target->tree().scopedChild(name);
         // Notice that we can't call HasRealNamedProperty for ACCESS_HAS
         // because that would generate infinite recursion.
         if (type == v8::ACCESS_HAS && childFrame)
             return true;
         // We need to explicitly compare against nameOfProtoProperty because
         // V8's JSObject::LocalLookup finds __proto__ before
         // interceptors and even when __proto__ isn't a "real named property".
         v8::Handle<v8::String> keyString = key.As<v8::String>();
         if (type == v8::ACCESS_GET
             && childFrame
@@ skipping 18 matching lines @@
     ASSERT(targetWindow);
 
     Frame* target = targetWindow->frame();
     if (!target)
         return false;
 
     // Notify the loader's client if the initial document has been accessed.
     if (target->loader()->stateMachine()->isDisplayingInitialEmptyDocument())
         target->loader()->didAccessInitialDocument();
 
-    Frame* childFrame =  target->tree()->scopedChild(index);
+    Frame* childFrame =  target->tree().scopedChild(index);
 
     // Notice that we can't call HasRealNamedProperty for ACCESS_HAS
     // because that would generate infinite recursion.
     if (type == v8::ACCESS_HAS && childFrame)
         return true;
     if (type == v8::ACCESS_GET
         && childFrame
         && !host->HasRealIndexedProperty(index)
         && !window->HasRealIndexedProperty(index))
         return true;
@@ skipping 30 matching lines @@
     v8::Handle<v8::Context> context = frame->script()->currentWorldContext();
     if (context.IsEmpty())
         return v8Undefined();
 
     v8::Handle<v8::Object> global = context->Global();
     ASSERT(!global.IsEmpty());
     return global;
 }
 
 } // namespace WebCore