DevTools: Do not load css resources content before CSS agent is enabled.

Source/core/inspector/InspectorResourceContentLoader.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/inspector/InspectorResourceContentLoader.h"
 
 #include "core/FetchInitiatorTypeNames.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StyleSheetContents.h"
@@ skipping 33 matching lines @@
 void InspectorResourceContentLoader::ResourceClient::setCSSStyleSheet(const String&, const KURL& url, const String&, const CSSStyleSheetResource* resource)
 {
     if (m_loader)
         m_loader->resourceFinished(this);
     const_cast<CSSStyleSheetResource*>(resource)->removeClient(this);
     delete this;
 }
 
 InspectorResourceContentLoader::InspectorResourceContentLoader(Page* page)
     : m_allRequestsStarted(false)
+    , m_started(false)
+    , m_page(page)
 {
+}
+
+void InspectorResourceContentLoader::start()
+{
+    m_started = true;
     Vector<Document*> documents;
-    for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
+    for (Frame* frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (!frame->isLocalFrame())
             continue;
         LocalFrame* localFrame = toLocalFrame(frame);
         documents.append(localFrame->document());
         documents.appendVector(InspectorPageAgent::importsForFrame(localFrame));
     }
     for (Vector<Document*>::const_iterator documentIt = documents.begin(); documentIt != documents.end(); ++documentIt) {
         Document* document = *documentIt;
 
         HashSet<String> urlsToFetch;
@@ skipping 14 matching lines @@
             ResourceClient* resourceClient = new ResourceClient(this);
             m_pendingResourceClients.add(resourceClient);
             resourceClient->waitForResource(resource.get());
         }
     }
 
     m_allRequestsStarted = true;
     checkDone();
 }
 
-void InspectorResourceContentLoader::addListener(PassOwnPtr<VoidCallback> callback)
+void InspectorResourceContentLoader::ensureResourcesContentLoaded(PassOwnPtr<VoidCallback> callback)
 {
+    if (!m_started)
+        start();
     m_callbacks.append(callback);
     checkDone();
 }
 
 InspectorResourceContentLoader::~InspectorResourceContentLoader()
 {
     stop();
 }
 
 void InspectorResourceContentLoader::stop()
@@ skipping 22 matching lines @@
         (*it)->handleEvent();
 }
 
 void InspectorResourceContentLoader::resourceFinished(ResourceClient* client)
 {
     m_pendingResourceClients.remove(client);
     checkDone();
 }
 
 } // namespace WebCore