Allow direct and indirect navigation values to be varied via field trial.

chrome/android/java/src/org/chromium/chrome/browser/banners/AppBannerManager.java

 // Copyright 2014 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.banners;
 
 import android.content.Context;
 import android.text.TextUtils;
 
 import org.chromium.base.ApplicationStatus;
@@ skipping 139 matching lines @@
     }
 
     /** Disables the HTTPS scheme requirement for testing. */
     @VisibleForTesting
     static void disableSecureSchemeCheckForTesting() {
         nativeDisableSecureSchemeCheckForTesting();
     }
 
     /** Sets the weights of direct and indirect page navigations for testing. */
     @VisibleForTesting
-    static void forceEngagementWeightsForTesting(double directEngagement,
-            double indirectEngagement) {
-        nativeForceEngagementWeightsForTesting(directEngagement, indirectEngagement);
+    static void setEngagementWeights(double directEngagement, double indirectEngagement) {
+        nativeSetEngagementWeights(directEngagement, indirectEngagement);
     }
 
     /** Returns whether a AppBannerDataFetcher is actively retrieving data. */
     @VisibleForTesting
     public boolean isFetcherActiveForTesting() {
         return nativeIsFetcherActive(mNativePointer);
     }
 
     private static native boolean nativeIsEnabled();
     private native long nativeInit(int iconSize);
     private native void nativeDestroy(long nativeAppBannerManagerAndroid);
     private native void nativeReplaceWebContents(long nativeAppBannerManagerAndroid,
             WebContents webContents);
     private native boolean nativeOnAppDetailsRetrieved(long nativeAppBannerManagerAndroid,
             AppData data, String title, String packageName, String imageUrl);
 
     // Testing methods.
     private static native void nativeSetTimeDeltaForTesting(int days);
     private static native void nativeDisableSecureSchemeCheckForTesting();
-    private static native void nativeForceEngagementWeightsForTesting(
-            double directEngagement, double indirectEngagement);
+    private static native void nativeSetEngagementWeights(double directEngagement,
+            double indirectEngagement);
     private native boolean nativeIsFetcherActive(long nativeAppBannerManagerAndroid);
 }