Have Frame::loader() return a reference

Source/core/inspector/InspectorApplicationCacheAgent.cpp

Index: Source/core/inspector/InspectorApplicationCacheAgent.cpp
diff --git a/Source/core/inspector/InspectorApplicationCacheAgent.cpp b/Source/core/inspector/InspectorApplicationCacheAgent.cpp
index be045acb3241419b873c88e12552840dd10b2df1..600ecd955c0bafe88cdd9c51d928b3186209ed5d 100644
--- a/Source/core/inspector/InspectorApplicationCacheAgent.cpp
+++ b/Source/core/inspector/InspectorApplicationCacheAgent.cpp
@@ -80,7 +80,7 @@ void InspectorApplicationCacheAgent::enable(ErrorString*)
 
 void InspectorApplicationCacheAgent::updateApplicationCacheStatus(Frame* frame)
 {
-    DocumentLoader* documentLoader = frame->loader()->documentLoader();
+    DocumentLoader* documentLoader = frame->loader().documentLoader();
     if (!documentLoader)
         return;
 
@@ -103,7 +103,7 @@ void InspectorApplicationCacheAgent::getFramesWithManifests(ErrorString*, RefPtr
 
     Frame* mainFrame = m_pageAgent->mainFrame();
     for (Frame* frame = mainFrame; frame; frame = frame->tree().traverseNext(mainFrame)) {
-        DocumentLoader* documentLoader = frame->loader()->documentLoader();
+        DocumentLoader* documentLoader = frame->loader().documentLoader();
         if (!documentLoader)
             continue;