Mixed Content: Make MixedContentChecker completely static.

Source/core/fetch/ResourceFetcher.cpp

Index: Source/core/fetch/ResourceFetcher.cpp
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index 49281ce02771e372f832a7985b258d53f4ae0c8f..25270689d7b764e94cd4c7e7a9f3ea3f9738ec46 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -51,6 +51,7 @@
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
+#include "core/loader/MixedContentChecker.h"
 #include "core/loader/PingLoader.h"
 #include "core/loader/SubstituteData.h"
 #include "core/loader/UniqueIdentifier.h"
@@ -564,7 +565,7 @@ bool ResourceFetcher::canRequest(Resource::Type type, const ResourceRequest& res
             effectiveFrame = toLocalFrame(frame()->tree().parent());
     }
 
-    return !MixedContentChecker::shouldBlockFetch(effectiveFrame, resourceRequest, url);
+    return !MixedContentChecker::shouldBlockFetch(effectiveFrame, resourceRequest.requestContext(), resourceRequest.frameType(), url);
 }
 
 bool ResourceFetcher::canAccessResource(Resource* resource, SecurityOrigin* sourceOrigin, const KURL& url) const