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

base/android/java/templates/BuildConfig.template

Index: base/android/java/templates/BuildConfig.template
diff --git a/base/android/java/templates/BuildConfig.template b/base/android/java/templates/BuildConfig.template
index 16f02f6a6cf7daf43ec8db98f43303a435d1f3bf..a33d666e375f2b9ea27e334f4e666adfeef19676 100644
--- a/base/android/java/templates/BuildConfig.template
+++ b/base/android/java/templates/BuildConfig.template
@@ -22,6 +22,20 @@ public class BuildConfig {
 #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;
@@ -46,4 +60,12 @@ public class BuildConfig {
 #else
       {};
 #endif
+
+    // TODO(estevenson): comment.
+    public static final String[] MAIN_DEX_CLASSES =
+#if defined(MAIN_DEX_CLASSES_LIST)
+      MAIN_DEX_CLASSES_LIST;
+#else
+      {};
+#endif
 }