Revert of Change minimum length of Aura overlay scrollbars.

third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp

Index: third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
index 0c1ef12f7397147717857a10c601f1ed8181b498..45c1d47b252270283f021038985533db4ad76a8d 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeAura.cpp
@@ -213,16 +213,14 @@
 int ScrollbarThemeAura::minimumThumbLength(
     const ScrollbarThemeClient& scrollbar) {
   if (scrollbar.orientation() == VerticalScrollbar) {
-    return Platform::current()
-        ->themeEngine()
-        ->getSize(WebThemeEngine::PartScrollbarVerticalThumb)
-        .height;
-  }
-
-  return Platform::current()
-      ->themeEngine()
-      ->getSize(WebThemeEngine::PartScrollbarHorizontalThumb)
-      .width;
+    IntSize size = Platform::current()->themeEngine()->getSize(
+        WebThemeEngine::PartScrollbarVerticalThumb);
+    return size.height();
+  }
+
+  IntSize size = Platform::current()->themeEngine()->getSize(
+      WebThemeEngine::PartScrollbarHorizontalThumb);
+  return size.width();
 }
 
 void ScrollbarThemeAura::paintTrackBackground(GraphicsContext& context,