DO NOT SUBMIT: add main dex list check to classloader.

base/android/java/templates/BuildConfig.template

 // Copyright 2015 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.base;
 
 /**
  *  Build configuration. Generated on a per-target basis.
  */
 public class BuildConfig {
 
     /** Whether multidex is enabled for this target.
      *
      *  This has to be a function instead of a static final boolean s.t. the initial false value
      *  doesn't get optimized into {@link ChromiumMultiDexInstaller} at base_java compile time.
      */
     public static boolean isMultidexEnabled() {
 #if defined(ENABLE_MULTIDEX)
         return true;
 #else
         return false;
 #endif
     }
 
+    /**
+     * Whether or not this target was built as part of an official build.
+     *
+     * This has to be a function instead of a static final boolean s.t. the initial false value
+     * doesn't get optimized into {@link ChromeApplication} at base_java compile time.
+     */
+     public static boolean isOfficialBuild() {
+#if defined(IS_OFFICIAL_BUILD)
+        return true;
+#else
+        return false;
+#endif
+     }
+
     // DCHECK_IS_ON does not change between targets, can be final and optimized out.
 #if defined(_DCHECK_IS_ON)
     public static final boolean DCHECK_IS_ON = true;
 #else
     public static final boolean DCHECK_IS_ON = false;
 #endif
 
     // Sorted list of locales that have a compressed .pak within assets.
     // Stored as an array because AssetManager.list() is slow.
     public static final String[] COMPRESSED_LOCALES =
 #if defined(COMPRESSED_LOCALE_LIST)
       COMPRESSED_LOCALE_LIST;
 #else
       {};
 #endif
 
     // Sorted list of locales that have an uncompressed .pak within assets.
     // Stored as an array because AssetManager.list() is slow.
     public static final String[] UNCOMPRESSED_LOCALES =
 #if defined(UNCOMPRESSED_LOCALE_LIST)
       UNCOMPRESSED_LOCALE_LIST;
 #else
       {};
 #endif
+
+    // TODO(estevenson): comment.
+    public static final String[] MAIN_DEX_CLASSES =
+#if defined(MAIN_DEX_CLASSES_LIST)
+      MAIN_DEX_CLASSES_LIST;
+#else
+      {};
+#endif
 }