Lands http://codereview.chromium.org/227008 for Charlie:...

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
===================================================================
--- chrome/common/pref_names.cc	(revision 26838)
+++ chrome/common/pref_names.cc	(working copy)
@@ -190,8 +190,11 @@
 extern const wchar_t kVertEdgeScrollEnabled[] =
     L"settings.touchpad.enable_vert_edge_scroll";
 
-// A double pref for the touchpad speed factor.
+// A integer pref for the touchpad speed factor.
 extern const wchar_t kTouchpadSpeedFactor[] = L"settings.touchpad.speed_factor";
+
+// A integer pref for the touchpad sensitivity.
+extern const wchar_t kTouchpadSensitivity[] = L"settings.touchpad.sensitivity";
 #endif
 
 // The disabled messages in IPC logging.