Split NativeThemeAura into Overlay and NonOverlay versions.

content/child/webthemeengine_impl_android.cc

Index: content/child/webthemeengine_impl_android.cc
diff --git a/content/child/webthemeengine_impl_android.cc b/content/child/webthemeengine_impl_android.cc
index fa693b3cf9cb828de50d999ba530dc43c3a85629..273c7514daf852a08a4ea8daec085c6a50ae6827 100644
--- a/content/child/webthemeengine_impl_android.cc
+++ b/content/child/webthemeengine_impl_android.cc
@@ -168,7 +168,7 @@ static void GetNativeThemeExtraParams(
 
 blink::WebSize WebThemeEngineImpl::getSize(WebThemeEngine::Part part) {
   ui::NativeTheme::ExtraParams extra;
-  return ui::NativeTheme::GetInstanceForWeb()->GetPartSize(
+  return ui::NativeTheme::GetInstanceForWeb(true)->GetPartSize(
       NativeThemePart(part), ui::NativeTheme::kNormal, extra);
 }
 
@@ -199,7 +199,7 @@ void WebThemeEngineImpl::paint(
   ui::NativeTheme::ExtraParams native_theme_extra_params;
   GetNativeThemeExtraParams(
       part, state, extra_params, &native_theme_extra_params);
-  ui::NativeTheme::GetInstanceForWeb()->Paint(
+  ui::NativeTheme::GetInstanceForWeb(true)->Paint(
       canvas, NativeThemePart(part), NativeThemeState(state), gfx::Rect(rect),
       native_theme_extra_params);
 }