[oilpan] Make the oilpan branch build on Mac.

Source/core/rendering/RenderThemeChromiumMac.mm

Index: Source/core/rendering/RenderThemeChromiumMac.mm
diff --git a/Source/core/rendering/RenderThemeChromiumMac.mm b/Source/core/rendering/RenderThemeChromiumMac.mm
index c180760affb842cb58a345c82e791bdd6195eaf6..7f003b57737b17d5faa265d5dba590cc414e2b2e 100644
--- a/Source/core/rendering/RenderThemeChromiumMac.mm
+++ b/Source/core/rendering/RenderThemeChromiumMac.mm
@@ -1543,7 +1543,7 @@ void RenderThemeChromiumMac::adjustSearchFieldStyle(StyleResolver* styleResolver
 
 bool RenderThemeChromiumMac::paintSearchFieldCancelButton(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
 {
-    const Handle<Element>& input = o->node()->shadowHost();
+    Handle<Element> input = adoptRawResult(o->node()->shadowHost());
     if (!input)
         input = toElement(o->node());
 
@@ -1555,7 +1555,7 @@ bool RenderThemeChromiumMac::paintSearchFieldCancelButton(RenderObject* o, const
 
     NSSearchFieldCell* search = this->search();
 
-    if (!input->isDisabledFormControl() && (input->isTextFormControl() && !toHTMLTextFormControlElement(input)->isReadOnly())) {
+    if (!input->isDisabledFormControl() && (input->isTextFormControl() && !toHTMLTextFormControlElement(input.raw())->isReadOnly())) {
         updateActiveState([search cancelButtonCell], o);
         updatePressedState([search cancelButtonCell], o);
     }
@@ -1637,7 +1637,7 @@ void RenderThemeChromiumMac::adjustSearchFieldResultsDecorationStyle(StyleResolv
 
 bool RenderThemeChromiumMac::paintSearchFieldResultsDecoration(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
 {
-    Node* input = o->node()->shadowHost();
+    Handle<Node> input = adoptRawResult(o->node()->shadowHost());
     if (!input)
         input = o->node();
     if (!input->renderer()->isBox())
@@ -1672,7 +1672,7 @@ void RenderThemeChromiumMac::adjustSearchFieldResultsButtonStyle(StyleResolver*,
 
 bool RenderThemeChromiumMac::paintSearchFieldResultsButton(RenderObject* o, const PaintInfo& paintInfo, const IntRect& r)
 {
-    Node* input = o->node()->shadowHost();
+    Handle<Node> input = adoptRawResult(o->node()->shadowHost());
     if (!input)
         input = o->node();
     if (!input->renderer()->isBox())