Rename FeatureObserver to UseCounter to make clear that all it stores are usage counts.

Source/WebCore/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 2798 matching lines @@
 
 void FrameLoader::applyUserAgent(ResourceRequest& request)
 {
     String userAgent = this->userAgent(request.url());
     ASSERT(!userAgent.isNull());
     request.setHTTPUserAgent(userAgent);
 }
 
 bool FrameLoader::shouldInterruptLoadForXFrameOptions(const String& content, const KURL& url, unsigned long requestIdentifier)
 {
-    FeatureObserver::observe(m_frame->document(), FeatureObserver::XFrameOptions);
+    UseCounter::observe(m_frame->document(), UseCounter::XFrameOptions);
 
     Frame* topFrame = m_frame->tree()->top();
     if (m_frame == topFrame)
         return false;
 
     XFrameOptionsDisposition disposition = parseXFrameOptionsHeader(content);
 
     switch (disposition) {
     case XFrameOptionsSameOrigin: {
-        FeatureObserver::observe(m_frame->document(), FeatureObserver::XFrameOptionsSameOrigin);
+        UseCounter::observe(m_frame->document(), UseCounter::XFrameOptionsSameOrigin);
         RefPtr<SecurityOrigin> origin = SecurityOrigin::create(url);
         if (!origin->isSameSchemeHostPort(topFrame->document()->securityOrigin()))
             return true;
         for (Frame* frame = m_frame->tree()->parent(); frame; frame = frame->tree()->parent()) {
             if (!origin->isSameSchemeHostPort(frame->document()->securityOrigin())) {
-                FeatureObserver::observe(m_frame->document(), FeatureObserver::XFrameOptionsSameOriginWithBadAncestorChain);
+                UseCounter::observe(m_frame->document(), UseCounter::XFrameOptionsSameOriginWithBadAncestorChain);
                 break;
             }
         }
         return false;
     }
     case XFrameOptionsDeny:
         return true;
     case XFrameOptionsAllowAll:
         return false;
     case XFrameOptionsConflict:
@@ skipping 278 matching lines @@
     m_client->dispatchDidCommitLoad();
 
     if (isLoadingMainFrame()) {
         m_frame->page()->resetSeenPlugins();
         m_frame->page()->resetSeenMediaEngines();
     }
 
     InspectorInstrumentation::didCommitLoad(m_frame, m_documentLoader.get());
 
     if (m_frame->page()->mainFrame() == m_frame)
-        m_frame->page()->featureObserver()->didCommitLoad();
+        m_frame->page()->useCounter()->didCommitLoad();
 
 }
 
 void FrameLoader::tellClientAboutPastMemoryCacheLoads()
 {
     ASSERT(m_frame->page());
     ASSERT(m_frame->page()->areMemoryCacheClientCallsEnabled());
 
     if (!m_documentLoader)
         return;
@@ skipping 121 matching lines @@
     FloatRect newWindowRect = DOMWindow::adjustWindowRect(page, windowRect);
 
     page->chrome()->setWindowRect(newWindowRect);
     page->chrome()->show();
 
     created = true;
     return frame;
 }
 
 } // namespace WebCore