[TTS] Add some initial signals for Tap in content.

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.contextualsearch;
 
 import android.text.TextUtils;
 
 import org.chromium.base.CommandLine;
 import org.chromium.base.SysUtils;
@@ skipping 30 matching lines @@
     static final String DISABLE_TRANSLATION = "disable_translation";
     // Enables usage of English as the target language even when it's the primary UI language.
     @VisibleForTesting
     static final String ENABLE_ENGLISH_TARGET_TRANSLATION =
             "enable_english_target_translation";
 
     // TODO(donnd): remove all supporting code once short-lived data collection is done.
     private static final String SCREEN_TOP_SUPPRESSION_DPS = "screen_top_suppression_dps";
     private static final String ENABLE_BAR_OVERLAP_COLLECTION = "enable_bar_overlap_collection";
     private static final String BAR_OVERLAP_SUPPRESSION_ENABLED = "enable_bar_overlap_suppression";
+    private static final String WORD_EDGE_SUPPRESSION_ENABLED = "enable_word_edge_suppression";
+    private static final String SHORT_WORD_SUPPRESSION_ENABLED = "enable_short_word_suppression";
+    private static final String WORD_NOT_LONG_ENOUGH_SUPPRESSION_ENABLED =
+            "enable_word_not_long_enough_suppression";
 
     private static final String MINIMUM_SELECTION_LENGTH = "minimum_selection_length";
 
     // Safety switch for disabling online-detection.  Also used to disable detection when running
     // tests.
     @VisibleForTesting
     static final String ONLINE_DETECTION_DISABLED = "disable_online_detection";
 
     private static final String DISABLE_AMP_AS_SEPARATE_TAB = "disable_amp_as_separate_tab";
 
@@ skipping 10 matching lines @@
     private static Boolean sDisableSearchTermResolution;
     private static Boolean sIsMandatoryPromoEnabled;
     private static Integer sMandatoryPromoLimit;
     private static Boolean sIsPeekPromoEnabled;
     private static Integer sPeekPromoMaxCount;
     private static Boolean sIsTranslationDisabled;
     private static Boolean sIsEnglishTargetTranslationEnabled;
     private static Integer sScreenTopSuppressionDps;
     private static Boolean sIsBarOverlapCollectionEnabled;
     private static Boolean sIsBarOverlapSuppressionEnabled;
+    private static Boolean sIsWordEdgeSuppressionEnabled;
+    private static Boolean sIsShortWordSuppressionEnabled;
+    private static Boolean sIsWordNotLongEnoughSuppressionEnabled;
     private static Integer sMinimumSelectionLength;
     private static Boolean sIsOnlineDetectionDisabled;
     private static Boolean sIsAmpAsSeparateTabDisabled;
     private static Boolean sContextualSearchSingleActionsEnabled;
     private static Boolean sIsSendHomeCountryDisabled;
     private static Boolean sIsPageContentNotificationDisabled;
     private static Boolean sContextualSearchUrlActionsEnabled;
     private static Boolean sIsRankerLoggingEnabled;
 
     /**
@@ skipping 156 matching lines @@
      *         Bar peeking location.
      */
     static boolean isBarOverlapSuppressionEnabled() {
         if (sIsBarOverlapSuppressionEnabled == null) {
             sIsBarOverlapSuppressionEnabled = getBooleanParam(BAR_OVERLAP_SUPPRESSION_ENABLED);
         }
         return sIsBarOverlapSuppressionEnabled.booleanValue();
     }
 
     /**
+     * @return Whether triggering is suppressed by a tap that's near the edge of a word.
+     */
+    static boolean isWordEdgeSuppressionEnabled() {
+        if (sIsWordEdgeSuppressionEnabled == null) {
+            sIsWordEdgeSuppressionEnabled = getBooleanParam(WORD_EDGE_SUPPRESSION_ENABLED);
+        }
+        return sIsWordEdgeSuppressionEnabled.booleanValue();
+    }
+
+    /**
+     * @return Whether triggering is suppressed by a tap that's in a short word.
+     */
+    static boolean isShortWordSuppressionEnabled() {
+        if (sIsShortWordSuppressionEnabled == null) {
+            sIsShortWordSuppressionEnabled = getBooleanParam(SHORT_WORD_SUPPRESSION_ENABLED);
+        }
+        return sIsShortWordSuppressionEnabled.booleanValue();
+    }
+
+    /**
+     * @return Whether triggering is suppressed by a tap that's in a word that's considered not
+     *         long enough.
+     */
+    static boolean isWordNotLongEnoughSuppressionEnabled() {
+        if (sIsWordNotLongEnoughSuppressionEnabled == null) {
+            sIsWordNotLongEnoughSuppressionEnabled =
+                    getBooleanParam(WORD_NOT_LONG_ENOUGH_SUPPRESSION_ENABLED);
+        }
+        return sIsWordNotLongEnoughSuppressionEnabled.booleanValue();
+    }
+
+    /**
      * @return The minimum valid selection length.
      */
     static int getMinimumSelectionLength() {
         if (sMinimumSelectionLength == null) {
             sMinimumSelectionLength = getIntParamValueOrDefault(MINIMUM_SELECTION_LENGTH, 0);
         }
         return sMinimumSelectionLength.intValue();
     }
 
     /**
@@ skipping 112 matching lines @@
             try {
                 return Integer.parseInt(value);
             } catch (NumberFormatException e) {
                 return defaultValue;
             }
         }
 
         return defaultValue;
     }
 }