mouse: Make high-resolution scrolling the default

It's been set to on by default in Chrome for a while, so we may as well
reflect that here to avoid confusion.

BUG=chromium:888172
TEST=run unit tests

Change-Id: I4d8f83aafdc6ac1de1f538fd6a370c4009fdb093
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/2353412
Tested-by: Harry Cutts <hcutts@chromium.org>
Auto-Submit: Harry Cutts <hcutts@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Harry Cutts <hcutts@chromium.org>
diff --git a/src/mouse_interpreter.cc b/src/mouse_interpreter.cc
index e90260a..b8bf449 100644
--- a/src/mouse_interpreter.cc
+++ b/src/mouse_interpreter.cc
@@ -24,7 +24,7 @@
       wheel_emulation_accu_y_(0.0),
       wheel_emulation_active_(false),
       reverse_scrolling_(prop_reg, "Mouse Reverse Scrolling", false),
-      hi_res_scrolling_(prop_reg, "Mouse High Resolution Scrolling", false),
+      hi_res_scrolling_(prop_reg, "Mouse High Resolution Scrolling", true),
       scroll_accel_curve_prop_(prop_reg, "Mouse Scroll Accel Curve",
           scroll_accel_curve_, sizeof(scroll_accel_curve_) / sizeof(double)),
       scroll_max_allowed_input_speed_(prop_reg,