Add autoclick to settings page under the accessibility section.

ash/autoclick/autoclick_controller.h

Index: ash/autoclick/autoclick_controller.h
diff --git a/ash/autoclick/autoclick_controller.h b/ash/autoclick/autoclick_controller.h
index 481660fbda281cf456fef2bdc001ef97ec459133..6bf072fc8a88b6def8f83cf7c03124ee65aa9c6b 100644
--- a/ash/autoclick/autoclick_controller.h
+++ b/ash/autoclick/autoclick_controller.h
@@ -7,6 +7,9 @@
 
 namespace ash {
 
+// The default wait time between last mouse movement and sending the autoclick.
+const int kDefaultAutoclickDelayMs = 500;

[oshima, 2013/10/15 17:04:48]

can you move this to static memeber of AutoclickCOntroller ?

[Tim Song, 2013/10/15 22:23:31]

Done.

+
 // Controls the autoclick a11y feature in ash.
 // If enabled, we will automatically send a click event a short time after
 // the mouse had been at rest.
@@ -20,12 +23,12 @@ class AutoclickController {
   // Returns true if autoclicking is enabled.
   virtual bool IsEnabled() const = 0;
 
-  // Set the time to wait from when the mouse stops moving to when
-  // the autoclick event is sent.
-  virtual void SetClickWaitTime(int wait_time_ms) = 0;
+  // Set the time to wait in milliseconds from when the mouse stops moving
+  // to when the autoclick event is sent.
+  virtual void SetAutoclickDelay(int delay_ms) = 0;
 
-  // Returns the wait time in milliseconds.
-  virtual int GetClickWaitTime() const = 0;
+  // Returns the autoclick delay in milliseconds.
+  virtual int GetAutoclickDelay() const = 0;
 
   static AutoclickController* CreateInstance();