[Contextual Search] Add Mojo-enabled API component.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
index da24817ceb6d8101132a6a9d62ac0c1d31ec58a3..c5f0a4e7ff2d13ef5eac3632f49c7f1f03cc60ef 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java
@@ -52,6 +52,10 @@ public class ContextualSearchFieldTrial {
     private static final int DEFAULT_TAP_NAVIGATION_DETECTION_DELAY = 16;
     private static final String NAVIGATION_DETECTION_DELAY = "tap_navigation_detection_delay";
 
+    // Quick Answers.
+    private static final String QUICK_ANSWERS_ENABLED = "quick_answers_enabled";
+
+    // Tap handling.
     private static final int UNLIMITED_TAPS = -1;
     private static final int DEFAULT_TAP_RESOLVE_LIMIT_FOR_DECIDED = UNLIMITED_TAPS;
     private static final int DEFAULT_TAP_PREFETCH_LIMIT_FOR_DECIDED = UNLIMITED_TAPS;
@@ -62,6 +66,7 @@ public class ContextualSearchFieldTrial {
     private static Boolean sEnabled;
     private static Boolean sIsPeekPromoEnabled;
     private static Integer sPeekPromoMaxCount;
+    private static Boolean sIsQuickAnswersEnabled;
 
     /**
      * Don't instantiate.
@@ -263,6 +268,16 @@ public class ContextualSearchFieldTrial {
         return sPeekPromoMaxCount.intValue();
     }
 
+    /**
+     * @return Whether showing "quick answers" in the Bar is enabled.
+     */
+    static boolean isQuickAnswersEnabled() {
+        if (sIsQuickAnswersEnabled == null) {
+            sIsQuickAnswersEnabled = getBooleanParam(QUICK_ANSWERS_ENABLED);
+        }
+        return sIsQuickAnswersEnabled.booleanValue();
+    }
+
     // --------------------------------------------------------------------------------------------
     // Helpers.
     // --------------------------------------------------------------------------------------------