Don't share renderers between unrelated tabs on Android.

chrome/android/java/src/org/chromium/chrome/browser/sync/ChromiumSyncAdapter.java

 // Copyright 2013 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.sync;
 
 import android.accounts.Account;
 import android.app.Application;
 import android.content.AbstractThreadedSyncAdapter;
 import android.content.ContentProviderClient;
@@ skipping 94 matching lines @@
             Log.w(TAG, "Got exception when trying to request a sync. Informing Android system.", e);
             // Using numIoExceptions so Android will treat this as a soft error.
             syncResult.stats.numIoExceptions++;
             semaphore.release();
         }
     }
 
     private void startBrowserProcessesSync(
             final BrowserStartupController.StartupCallback callback) {
         try {
-            BrowserStartupController.get(mApplication).startBrowserProcessesSync(
-                    BrowserStartupController.MAX_RENDERERS_LIMIT);
+            BrowserStartupController.get(mApplication).startBrowserProcessesSync(false);
         } catch (ProcessInitException e) {
             Log.e(TAG, "Unable to load native library.", e);
             System.exit(-1);
         }
         new Handler().post(new Runnable() {
             @Override
             public void run() {
                 callback.onSuccess(false);
             }
         });
@@ skipping 44 matching lines @@
     public void requestSync(int objectSource, String objectId, long version, String payload) {
         ProfileSyncService.get(mApplication)
                 .requestSyncFromNativeChrome(objectSource, objectId, version, payload);
     }
 
     @VisibleForTesting
     public void requestSyncForAllTypes() {
         ProfileSyncService.get(mApplication).requestSyncFromNativeChromeForAllTypes();
     }
 }