wip: Second crack at implementing the touch exploration mode.

ash/ash_switches.cc

Index: ash/ash_switches.cc
diff --git a/ash/ash_switches.cc b/ash/ash_switches.cc
index f6bfeda6f45760937ad15825b2a9954aced9d424..26d3e5bf6a48b5f27c104c38bdaf2d08eff973a8 100644
--- a/ash/ash_switches.cc
+++ b/ash/ash_switches.cc
@@ -46,6 +46,12 @@ const char kAshDisableAlternateFrameCaptionButtonStyle[] =
 // Disable ability to dock windows at the desktop edge.
 const char kAshDisableDockedWindows[] = "ash-disable-docked-windows";
 
+// Disable the Touch Exploration Mode. Touch Exploration Mode is no longer
+// turned on automatically when spoken feedback is enabled when this flag is
+// set.
+const char kAshDisableTouchExplorationMode[] =
+    "ash-disable-touch-exploration-mode";
+
 // Use alternate visual style for the caption buttons (minimize, maximize,
 // restore, close). The alternate style:
 // - Adds a dedicated button for minimize.