Disable overscroll on Windows machines w/o touchscreen

chrome/browser/ui/browser_util_win.cc

Index: chrome/browser/ui/browser_util_win.cc
diff --git a/chrome/browser/ui/browser_util_win.cc b/chrome/browser/ui/browser_util_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a90d120fbd81c5fabb5ffd176a71289bf32a4027
--- /dev/null
+++ b/chrome/browser/ui/browser_util_win.cc
@@ -0,0 +1,16 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/browser_util.h"
+
+#include "ui/base/touch/touch_device.h"
+
+bool BrowserUtil::CanOverscrollContent() const {
+  // Don't enable overscroll on Windows machines unless they have a touch
+  // screen as these machines typically don't have a touchpad capable of
+  // horizontal scrolling. We are purposefully biased towards "no" here,
+  // so that we don't waste resources capturing screenshots for horizontal
+  // overscroll navigation unnecessarily.
+  return ui::IsTouchDevicePresent();
+}