[oilpan] Completely move HTMLFormControlElement's hierarchy to the managed heap

Source/core/html/shadow/TextFieldDecorationElement.cpp

Index: Source/core/html/shadow/TextFieldDecorationElement.cpp
diff --git a/Source/core/html/shadow/TextFieldDecorationElement.cpp b/Source/core/html/shadow/TextFieldDecorationElement.cpp
index c330767cbb4cb96d857f299142126badd9795980..b6755b7511b75451d80a08dc20f0c6f7353406ea 100644
--- a/Source/core/html/shadow/TextFieldDecorationElement.cpp
+++ b/Source/core/html/shadow/TextFieldDecorationElement.cpp
@@ -80,7 +80,7 @@ TextFieldDecorationElement* TextFieldDecorationElement::fromShadowRoot(ShadowRoo
     return toTextFieldDecorationElement(shadowRoot->firstChild()->lastChild());
 }
 
-static inline void getDecorationRootAndDecoratedRoot(HTMLInputElement* input, ShadowRoot*& decorationRoot, ShadowRoot*& decoratedRoot)
+static inline void getDecorationRootAndDecoratedRoot(Handle<HTMLInputElement> input, ShadowRoot*& decorationRoot, ShadowRoot*& decoratedRoot)
 {
     ShadowRoot* existingRoot = input->youngestShadowRoot();
     ShadowRoot* newRoot = 0;
@@ -96,13 +96,13 @@ static inline void getDecorationRootAndDecoratedRoot(HTMLInputElement* input, Sh
         // we can interleave user agent and author shadow roots on the element meaning
         // input.shadowRoot may be inaccessible if the browser has decided to decorate
         // the input.
-        newRoot = input->ensureShadow()->addShadowRoot(input, ShadowRoot::UserAgentShadowRoot);
+        newRoot = input->ensureShadow()->addShadowRoot(input.raw(), ShadowRoot::UserAgentShadowRoot);
     }
     decorationRoot = newRoot;
     decoratedRoot = existingRoot;
 }
 
-void TextFieldDecorationElement::decorate(HTMLInputElement* input, bool visible)
+void TextFieldDecorationElement::decorate(Handle<HTMLInputElement> input, bool visible)
 {
     ASSERT(input);
     ShadowRoot* existingRoot;
@@ -121,12 +121,12 @@ void TextFieldDecorationElement::decorate(HTMLInputElement* input, bool visible)
     box->appendChild(this);
 }
 
-inline HTMLInputElement* TextFieldDecorationElement::hostInput()
+inline Result<HTMLInputElement> TextFieldDecorationElement::hostInput()
 {
     // TextFieldDecorationElement is created only by C++ code, and it is always
     // in <input> shadow.
     ASSERT_WITH_SECURITY_IMPLICATION(!shadowHost() || shadowHost()->hasTagName(inputTag));
-    return static_cast<HTMLInputElement*>(shadowHost());
+    return Handle<HTMLInputElement>(static_cast<HTMLInputElement*>(shadowHost()));
 }
 
 bool TextFieldDecorationElement::isTextFieldDecoration() const
@@ -190,7 +190,7 @@ bool TextFieldDecorationElement::isMouseFocusable() const
 
 void TextFieldDecorationElement::defaultEventHandler(Event* event)
 {
-    RefPtr<HTMLInputElement> input(hostInput());
+    Handle<HTMLInputElement> input(hostInput());
     if (!input || input->isDisabledOrReadOnly() || !event->isMouseEvent()) {
         if (!event->defaultHandled())
             HTMLDivElement::defaultEventHandler(event);
@@ -199,7 +199,7 @@ void TextFieldDecorationElement::defaultEventHandler(Event* event)
 
     RefPtr<TextFieldDecorationElement> protector(this);
     if (event->type() == eventNames().clickEvent) {
-        m_textFieldDecorator->handleClick(input.get());
+        m_textFieldDecorator->handleClick(input);
         event->setDefaultHandled();
     }
 
@@ -219,7 +219,7 @@ void TextFieldDecorationElement::defaultEventHandler(Event* event)
 
 bool TextFieldDecorationElement::willRespondToMouseMoveEvents()
 {
-    const HTMLInputElement* input = hostInput();
+    Handle<const HTMLInputElement> input = hostInput();
     if (!input->isDisabledOrReadOnly())
         return true;
 
@@ -228,7 +228,7 @@ bool TextFieldDecorationElement::willRespondToMouseMoveEvents()
 
 bool TextFieldDecorationElement::willRespondToMouseClickEvents()
 {
-    const HTMLInputElement* input = hostInput();
+    Handle<const HTMLInputElement> input = hostInput();
     if (!input->isDisabledOrReadOnly())
         return true;