[android] Switch test scripts to use last modified time instead of md5sum when checking dependencie…

tools/android/timemodified/timemodified.cc

+// Copyright (c) 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.
+
+// Recursively prints file modified times for Android. This version handles
+// files as well as directories. Its output is sorted by file path.
+
+#include <iostream>
+#include <string>
+
+#include "base/file_util.h"
+#include "base/files/file_enumerator.h"
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/platform_file.h"
+#include "base/time/time.h"
+
+namespace {
+
+bool PrintFileAccessTime(const base::FilePath& path) {
+  base::PlatformFileInfo file_info;
+  if (!file_util::GetFileInfo(path, &file_info))
+    return false;
+  std::cout << file_info.last_modified.ToTimeT() << "  "
+            << base::MakeAbsoluteFilePath(path).value() << std::endl;
+  return true;
+}
+
+// Prints the access times of all files contained in |files|. This handles
+// directories by walking them recursively. Excludes .svn directories and files
+// under them.
+bool PrintAccessTimesRecursively(int num_files, const char** files) {
+  // TODO(craigdh): Have an ignore list including .git directories.
+  const std::string svn_dir_component = FILE_PATH_LITERAL("/.svn/");
+  for (const char** file = files; file != files + num_files; ++file) {
+    base::FilePath file_path(*file);
+    if (base::DirectoryExists(file_path)) {
+      base::FileEnumerator file_enumerator(
+          file_path, true /* recurse */, base::FileEnumerator::FILES);
+      base::FilePath child, empty;
+      while ((child = file_enumerator.Next()) != empty) {
+        // If the path contains /.svn/, ignore it.
+        if (child.value().find(svn_dir_component) == std::string::npos) {
+          if (!PrintFileAccessTime(child))
+            return false;
+        }
+      }
+    } else {
+      if (!PrintFileAccessTime(file_path))
+        return false;
+    }
+  }
+  return true;
+}
+
+}  // namespace
+
+int main(int argc, const char* argv[]) {
+  if (argc < 2) {
+    LOG(ERROR) << "Usage: timemodified <path/to/file_or_dir> ...";
+    return 1;
+  }
+  return PrintAccessTimesRecursively(argc - 1, argv + 1);
+}