Observe visibility of password inputs, for HTTP-bad phase 1

third_party/WebKit/Source/core/html/forms/PasswordInputType.h

Index: third_party/WebKit/Source/core/html/forms/PasswordInputType.h
diff --git a/third_party/WebKit/Source/core/html/forms/PasswordInputType.h b/third_party/WebKit/Source/core/html/forms/PasswordInputType.h
index cda25e7b0f14b956abe76e3f1d841b84f3c6a436..61648829f1548a412ea8355e947d657c73605047 100644
--- a/third_party/WebKit/Source/core/html/forms/PasswordInputType.h
+++ b/third_party/WebKit/Source/core/html/forms/PasswordInputType.h
@@ -31,6 +31,7 @@
 #ifndef PasswordInputType_h
 #define PasswordInputType_h
 
+#include "core/dom/ElementVisibilityObserver.h"
 #include "core/html/forms/BaseTextInputType.h"
 
 namespace blink {
@@ -38,9 +39,10 @@ namespace blink {
 class PasswordInputType final : public BaseTextInputType {
 public:
     static InputType* create(HTMLInputElement&);
+    DECLARE_VIRTUAL_TRACE();
 
 private:
-    PasswordInputType(HTMLInputElement& element) : BaseTextInputType(element) { }
+    PasswordInputType(HTMLInputElement&);
     void countUsage() override;
     const AtomicString& formControlType() const override;
     bool shouldSaveAndRestoreFormControlState() const override;
@@ -49,6 +51,10 @@ private:
     bool shouldRespectListAttribute() override;
     void enableSecureTextInput() override;
     void disableSecureTextInput() override;
+
+    void onVisibilityChanged(bool isVisible);
+
+    Member<ElementVisibilityObserver> m_visibilityObserver;
 };
 
 } // namespace blink