[Android] Use DIP coordinates with MotionEventAndroid

ui/events/gesture_detection/gesture_detector.h

Index: ui/events/gesture_detection/gesture_detector.h
diff --git a/ui/events/gesture_detection/gesture_detector.h b/ui/events/gesture_detection/gesture_detector.h
index 29a004ae02455fb07d83fa9bf386341823889b73..32b6935c7836dfcd3e35e8c463b8840d7c324ef2 100644
--- a/ui/events/gesture_detection/gesture_detector.h
+++ b/ui/events/gesture_detection/gesture_detector.h
@@ -23,13 +23,23 @@ class GestureDetector {
   struct GESTURE_DETECTION_EXPORT Config {
     Config();
     ~Config();
+
     base::TimeDelta longpress_timeout;
     base::TimeDelta showpress_timeout;
     base::TimeDelta double_tap_timeout;
-    int scaled_touch_slop;
-    int scaled_double_tap_slop;
-    int scaled_minimum_fling_velocity;
-    int scaled_maximum_fling_velocity;
+
+    // Distance a touch can wander before a scroll will occur (in dips).
+    float touch_slop;
+
+    // Distance the first touch can wander before it is no longer considerd a
+    // double tap (in dips).

[tdresser, 2014/04/09 14:00:01]

Maximum distance between the first and second touch downs before it is...

considerd -> considered.

[jdduke (slow), 2014/04/10 22:04:53]

Ah, I keep falling into the Texan spelling... ;)

[tdresser, 2014/04/11 12:18:14]

+1

+    float double_tap_slop;
+
+    // Minimum velocity to initiate a fling (in dips/second).
+    float minimum_fling_velocity;
+
+    // Maximum velocity of an initiated fling (in dips/second).
+    float maximum_fling_velocity;
   };
 
   class GestureListener {
@@ -114,11 +124,11 @@ class GestureDetector {
   GestureListener* const listener_;
   DoubleTapListener* double_tap_listener_;
 
-  int touch_slop_square_;
-  int double_tap_touch_slop_square_;
-  int double_tap_slop_square_;
-  int min_fling_velocity_;
-  int max_fling_velocity_;
+  float touch_slop_square_;
+  float double_tap_touch_slop_square_;
+  float double_tap_slop_square_;
+  float min_fling_velocity_;
+  float max_fling_velocity_;
   base::TimeDelta double_tap_timeout_;
 
   bool still_down_;