Mixed Content: Make MixedContentChecker completely static.

Source/core/loader/FrameLoader.cpp

Index: Source/core/loader/FrameLoader.cpp
diff --git a/Source/core/loader/FrameLoader.cpp b/Source/core/loader/FrameLoader.cpp
index 4cc6a0968b1e843ab9d2b72840a48f257ef1e60a..f1f6bef8cf38111b91beb6c0b4357e7804d00ecc 100644
--- a/Source/core/loader/FrameLoader.cpp
+++ b/Source/core/loader/FrameLoader.cpp
@@ -67,6 +67,7 @@
 #include "core/loader/FrameFetchContext.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoaderClient.h"
+#include "core/loader/MixedContentChecker.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/loader/UniqueIdentifier.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
@@ -113,7 +114,6 @@ static bool needsHistoryItemRestore(FrameLoadType type)
 
 FrameLoader::FrameLoader(LocalFrame* frame)
     : m_frame(frame)
-    , m_mixedContentChecker(frame)
     , m_progressTracker(ProgressTracker::create(frame))
     , m_state(FrameStateProvisional)
     , m_loadType(FrameLoadTypeStandard)