Revert of Implementing mixed content for forms posting to insecure location from secure ones

Source/core/html/HTMLFormElement.cpp

Index: Source/core/html/HTMLFormElement.cpp
diff --git a/Source/core/html/HTMLFormElement.cpp b/Source/core/html/HTMLFormElement.cpp
index 1c76f4382917e5960a57774afa612542b9beb631..566e8c19e40f2aa73d99201f720d2b2f8ff7090b 100644
--- a/Source/core/html/HTMLFormElement.cpp
+++ b/Source/core/html/HTMLFormElement.cpp
@@ -37,10 +37,6 @@
 #include "core/events/Event.h"
 #include "core/events/GenericEventQueue.h"
 #include "core/events/ScopedEventQueue.h"
-#include "core/frame/DOMWindow.h"
-#include "core/frame/LocalFrame.h"
-#include "core/frame/UseCounter.h"
-#include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLDialogElement.h"
 #include "core/html/HTMLImageElement.h"
@@ -50,25 +46,18 @@
 #include "core/html/forms/FormController.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
-#include "core/loader/MixedContentChecker.h"
+#include "core/frame/DOMWindow.h"
+#include "core/frame/LocalFrame.h"
+#include "core/frame/UseCounter.h"
+#include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/rendering/RenderTextControl.h"
 #include "platform/UserGestureIndicator.h"
-#include "wtf/text/AtomicString.h"
 
 using namespace std;
 
 namespace WebCore {
 
 using namespace HTMLNames;
-
-namespace {
-
-    KURL getActionURL(const Document& document, const String& action)
-    {
-        return (action.isEmpty() ? document.url() : document.completeURL(action));
-    }
-
-} // namespace
 
 HTMLFormElement::HTMLFormElement(Document& document)
     : HTMLElement(formTag, document)
@@ -358,10 +347,6 @@
 
     m_wasUserSubmitted = processingUserGesture;
 
-    KURL actionURL = getActionURL(document(), m_attributes.action());
-    if (MixedContentChecker::isMixedContent(document().securityOrigin(), actionURL))
-        UseCounter::count(document(), UseCounter::MixedContentSubmittedForm);
-
     RefPtrWillBeRawPtr<HTMLFormControlElement> firstSuccessfulSubmitButton = nullptr;
     bool needButtonActivation = activateSubmitButton; // do we need to activate a submit button?
 
@@ -805,20 +790,4 @@
     m_wasDemoted = demoted;
 }
 
-void HTMLFormElement::attributeChanged(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason)
-{
-    Element::attributeChanged(name, newValue);
-    if (name == actionAttr) {
-        // If the new action attribute is pointing to insecure "action" location from a secure page
-        // it is marked as "passive" mixed content. In other words, it will just
-        // show a console warning unless the user override the preferences to
-        // block all mixed content.
-        KURL actionURL = getActionURL(document(), m_attributes.action());
-        if (!document().frame()->loader().mixedContentChecker()->canSubmitToInsecureForm(document().securityOrigin(), actionURL))
-            Element::attributeChanged(name, AtomicString(""));
-        if (MixedContentChecker::isMixedContent(document().securityOrigin(), actionURL))
-            UseCounter::count(document(), UseCounter::MixedContentForm);
-    }
-}
-
 } // namespace