[Contextual Search] Use Mojo API for Quick Answers.

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 82098c3009db1bcdf8cde5247e43f5816cd13173..83ac1ceb368516231ef06deb6c8b50f29ea4f4c5 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
@@ -44,6 +44,9 @@ public class ContextualSearchFieldTrial {
             "disable_accept_languages_for_translation";
     static final String ENABLE_ENGLISH_TARGET_TRANSLATION = "enable_english_target_translation";
 
+    // Quick Answers.
+    private static final String ENABLE_QUICK_ANSWERS = "enable_quick_answers";
+
     // Cached values to avoid repeated and redundant JNI operations.
     private static Boolean sEnabled;
     private static Boolean sDisableSearchTermResolution;
@@ -55,6 +58,7 @@ public class ContextualSearchFieldTrial {
     private static Boolean sIsAcceptLanguagesForTranslationDisabled;
     private static Boolean sIsKeyboardLanguagesForTranslationDisabled;
     private static Boolean sIsEnglishTargetTranslationEnabled;
+    private static Boolean sIsQuickAnswersEnabled;
 
     /**
      * Don't instantiate.
@@ -228,6 +232,16 @@ public class ContextualSearchFieldTrial {
         return sIsEnglishTargetTranslationEnabled.booleanValue();
     }
 
+    /**
+     * @return Whether showing "quick answers" in the Bar is enabled.
+     */
+    static boolean isQuickAnswersEnabled() {
+        if (sIsQuickAnswersEnabled == null) {
+            sIsQuickAnswersEnabled = getBooleanParam(ENABLE_QUICK_ANSWERS);
+        }
+        return sIsQuickAnswersEnabled.booleanValue();
+    }
+
     // --------------------------------------------------------------------------------------------
     // Helpers.
     // --------------------------------------------------------------------------------------------