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

Source/core/html/FileInputType.cpp

Index: Source/core/html/FileInputType.cpp
diff --git a/Source/core/html/FileInputType.cpp b/Source/core/html/FileInputType.cpp
index b61e2cb2720a167bc684c1f415070d2d163466e6..2eb2063de32ed148d7581291e8e935930efbbd28 100644
--- a/Source/core/html/FileInputType.cpp
+++ b/Source/core/html/FileInputType.cpp
@@ -87,13 +87,13 @@ const AtomicString& UploadButtonElement::shadowPseudoId() const
     return pseudoId;
 }
 
-inline FileInputType::FileInputType(HTMLInputElement* element)
+inline FileInputType::FileInputType(Handle<HTMLInputElement> element)
     : BaseClickableWithKeyInputType(element)
     , m_fileList(FileList::create())
 {
 }
 
-PassOwnPtr<InputType> FileInputType::create(HTMLInputElement* element)
+PassOwnPtr<InputType> FileInputType::create(Handle<HTMLInputElement> element)
 {
     return adoptPtr(new FileInputType(element));
 }
@@ -184,7 +184,7 @@ void FileInputType::handleDOMActivateEvent(Event* event)
 
     if (Chrome* chrome = this->chrome()) {
         FileChooserSettings settings;
-        HTMLInputElement* input = element();
+        Handle<HTMLInputElement> input = element();
         settings.allowsDirectoryUpload = RuntimeEnabledFeatures::directoryUploadEnabled() && input->fastHasAttribute(webkitdirectoryAttr);
         settings.allowsMultipleFiles = settings.allowsDirectoryUpload || input->fastHasAttribute(multipleAttr);
         settings.acceptMIMETypes = input->acceptMIMETypes();
@@ -330,7 +330,7 @@ void FileInputType::setFiles(PassRefPtr<FileList> files)
     if (!files)
         return;
 
-    RefPtr<HTMLInputElement> input = element();
+    Handle<HTMLInputElement> input = element();
 
     bool pathsChanged = false;
     if (files->length() != m_fileList->length())
@@ -375,7 +375,7 @@ void FileInputType::receiveDropForDirectoryUpload(const Vector<String>& paths)
 {
     if (Chrome* chrome = this->chrome()) {
         FileChooserSettings settings;
-        HTMLInputElement* input = element();
+        Handle<HTMLInputElement> input = element();
         settings.allowsDirectoryUpload = true;
         settings.allowsMultipleFiles = true;
         settings.selectedFiles.append(paths[0]);
@@ -402,7 +402,7 @@ bool FileInputType::receiveDroppedFiles(const DragData* dragData)
     if (paths.isEmpty())
         return false;
 
-    HTMLInputElement* input = element();
+    Handle<HTMLInputElement> input = element();
     if (input->fastHasAttribute(webkitdirectoryAttr) && RuntimeEnabledFeatures::directoryUploadEnabled()) {
         receiveDropForDirectoryUpload(paths);
         return true;