Revert of Change minimum length of Aura overlay scrollbars.

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

Index: third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
diff --git a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
index 4b48e421ff6bf0343446524248152535051fe6bd..30ba2b9554699d95115ee07d6d3ed8f1506b2dd7 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
@@ -270,19 +270,4 @@
   return Platform::current()->themeEngine()->ninePatchAperture(part);
 }
 
-int ScrollbarThemeOverlay::minimumThumbLength(
-    const ScrollbarThemeClient& scrollbar) {
-  if (scrollbar.orientation() == VerticalScrollbar) {
-    return Platform::current()
-        ->themeEngine()
-        ->getSize(WebThemeEngine::PartScrollbarVerticalThumb)
-        .height;
-  }
-
-  return Platform::current()
-      ->themeEngine()
-      ->getSize(WebThemeEngine::PartScrollbarHorizontalThumb)
-      .width;
-}
-
 }  // namespace blink