[TTS] Basic Tap Suppression functionality.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapFarFromPreviousSuppression.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapFarFromPreviousSuppression.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapFarFromPreviousSuppression.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapFarFromPreviousSuppression.java
index 5596c4b1827a737f43be774faa54c0791e82b668..d88b9b3e41b49be204c6ee859699a0b73e855917 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapFarFromPreviousSuppression.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/TapFarFromPreviousSuppression.java
@@ -4,6 +4,11 @@
 
 package org.chromium.chrome.browser.contextualsearch;
 
+/**
+ * Implements the policy that a Tap relatively far away from an existing Contextual Search
+ * selection should just dismiss our UX.  When a Tap is close by, we assume the user must have
+ * missed the original intended target so we reselect based on the new Tap location.
+ */
 class TapFarFromPreviousSuppression extends ContextualSearchHeuristic {
     private static final double RETAP_DISTANCE_SQUARED_DP = Math.pow(75, 2);
 
@@ -19,7 +24,7 @@ class TapFarFromPreviousSuppression extends ContextualSearchHeuristic {
      * @param y The y coordinate of the tap gesture.
      */
     TapFarFromPreviousSuppression(ContextualSearchSelectionController controller,
-                                  ContextualSearchTapState previousTapState, int x, int y) {
+            ContextualSearchTapState previousTapState, int x, int y) {
         mPxToDp = controller.getPxToDp();
         mPreviousTapState = previousTapState;
         mShouldHandleTap = shouldHandleTap(x, y);
@@ -44,8 +49,8 @@ class TapFarFromPreviousSuppression extends ContextualSearchHeuristic {
      * tap.
      */
     private boolean wasTapCloseToPreviousTap(int x, int y) {
-        float deltaXDp = (mPreviousTapState.x() - x) * mPxToDp;
-        float deltaYDp = (mPreviousTapState.y() - y) * mPxToDp;
+        float deltaXDp = (mPreviousTapState.getX() - x) * mPxToDp;
+        float deltaYDp = (mPreviousTapState.getY() - y) * mPxToDp;
         float distanceSquaredDp = deltaXDp * deltaXDp + deltaYDp * deltaYDp;
         return distanceSquaredDp <= RETAP_DISTANCE_SQUARED_DP;
     }