Mixed Content: Make MixedContentChecker completely static.

Source/web/WebLocalFrameImpl.cpp

Index: Source/web/WebLocalFrameImpl.cpp
diff --git a/Source/web/WebLocalFrameImpl.cpp b/Source/web/WebLocalFrameImpl.cpp
index 51dbda1174f57616c369647799959cdc8a7106d3..a4ef3ca69934b7c524ef56777bdbae44b3460cab 100644
--- a/Source/web/WebLocalFrameImpl.cpp
+++ b/Source/web/WebLocalFrameImpl.cpp
@@ -118,6 +118,7 @@
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/HistoryItem.h"
+#include "core/loader/MixedContentChecker.h"
 #include "core/loader/SubstituteData.h"
 #include "core/page/Chrome.h"
 #include "core/page/EventHandler.h"
@@ -753,7 +754,7 @@ void WebLocalFrameImpl::collectGarbage()
 bool WebLocalFrameImpl::checkIfRunInsecureContent(const WebURL& url) const
 {
     ASSERT(frame());
-    return frame()->loader().mixedContentChecker()->canFrameInsecureContent(frame()->document()->securityOrigin(), url);
+    return !MixedContentChecker::shouldBlockFetch(frame(), WebURLRequest::RequestContextIframe, WebURLRequest::FrameTypeNested, url);
 }
 
 v8::Handle<v8::Value> WebLocalFrameImpl::executeScriptAndReturnValue(const WebScriptSource& source)