[icu] Support loading data file from default location

include/v8.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 6689 matching lines @@
       void VisitHandlesForPartialDependence(Isolate* isolate,
                                             PersistentHandleVisitor* visitor));
 
   /**
    * Initialize the ICU library bundled with V8. The embedder should only
    * invoke this method when using the bundled ICU. Returns true on success.
    *
    * If V8 was compiled with the ICU data in an external file, the location
    * of the data file has to be provided.
    */
-  static bool InitializeICU(const char* icu_data_file = NULL);
+  V8_DEPRECATE_SOON(
+      "Use version with default location.",
+      static bool InitializeICU(const char* icu_data_file = nullptr));
+
+  /**
+   * Initialize the ICU library bundled with V8. The embedder should only
+   * invoke this method when using the bundled ICU. If V8 was compiled with
+   * the ICU data in an external file and when the default location of that
+   * file should be used, a path to the executable must be provided.
+   * Returns true on success.
+   *
+   * The default is a file called icudtl.dat side-by-side with the executable.
+   *
+   * Optionally, the location of the data file can be provided to override the
+   * default.
+   */
+  static bool InitializeICUDefaultLocation(const char* exec_path,
+                                           const char* icu_data_file = nullptr);
 
   /**
    * Initialize the external startup data. The embedder only needs to
    * invoke this method when external startup data was enabled in a build.
    *
    * If V8 was compiled with the startup data in an external file, then
    * V8 needs to be given those external files during startup. There are
    * three ways to do this:
    * - InitializeExternalStartupData(const char*)
    *   This will look in the given directory for files "natives_blob.bin"
@@ skipping 2108 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_