Reland 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 30ba2b9554699d95115ee07d6d3ed8f1506b2dd7..af8f42dc78154cb64cad8d49022437f586fa46ee 100644
--- a/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
+++ b/third_party/WebKit/Source/platform/scroll/ScrollbarThemeOverlay.cpp
@@ -270,4 +270,17 @@ IntRect ScrollbarThemeOverlay::ninePatchThumbAperture(
   return Platform::current()->themeEngine()->ninePatchAperture(part);
 }
 
+int ScrollbarThemeOverlay::minimumThumbLength(
+    const ScrollbarThemeClient& scrollbar) {
+  if (scrollbar.orientation() == VerticalScrollbar) {
+    IntSize size = Platform::current()->themeEngine()->getSize(

[Evan Stade, 2017/03/23 23:16:24]

nit: return
Platform::current()->themeEngine()->getSize(WebThemeEngine::PartScrollbarVerticalThumb).height()?

[bokan, 2017/03/24 20:30:27]

Done (in ScrollbarThemeAura too).

+        WebThemeEngine::PartScrollbarVerticalThumb);
+    return size.height();
+  }
+
+  IntSize size = Platform::current()->themeEngine()->getSize(
+      WebThemeEngine::PartScrollbarHorizontalThumb);
+  return size.width();

[Evan Stade, 2017/03/23 23:16:24]

ditto

[bokan, 2017/03/24 20:30:27]

Done.

+}
+
 }  // namespace blink