[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 589f92612810cafdc838d2370f96f90b9e8ce920..1592703e1781346d063a9ea4266014f8e8ad464a 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
@@ -32,6 +32,10 @@ public class ContextualSearchFieldTrial {
     static final String PEEK_PROMO_MAX_SHOW_COUNT = "peek_promo_max_show_count";
     static final int PEEK_PROMO_DEFAULT_MAX_SHOW_COUNT = 10;
 
+    // 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;
@@ -42,6 +46,7 @@ public class ContextualSearchFieldTrial {
     private static Boolean sEnabled;
     private static Boolean sIsPeekPromoEnabled;
     private static Integer sPeekPromoMaxCount;
+    private static Boolean sIsQuickAnswersEnabled;
 
     /**
      * Don't instantiate.
@@ -199,6 +204,16 @@ 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.
     // --------------------------------------------------------------------------------------------