Update includes for webrtc/{base => rtc_base} rename (2/3)

webrtc/test/testsupport/isolated_output_unittest.cc

 /*
  *  Copyright (c) 2016 The WebRTC 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 in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/test/testsupport/isolated_output.h"
 
 #include <string.h>
 
 #include <string>
 
 #include "gflags/gflags.h"
-#include "webrtc/base/file.h"
-#include "webrtc/base/pathutils.h"
-#include "webrtc/base/platform_file.h"
+#include "webrtc/rtc_base/file.h"
+#include "webrtc/rtc_base/pathutils.h"
+#include "webrtc/rtc_base/platform_file.h"
 #include "webrtc/test/gtest.h"
 
 DECLARE_string(isolated_out_dir);
 
 namespace webrtc {
 namespace test {
 
 TEST(IsolatedOutputTest, ShouldRejectInvalidIsolatedOutDir) {
   std::string backup = FLAGS_isolated_out_dir;
   FLAGS_isolated_out_dir = "";
@@ skipping 21 matching lines @@
     EXPECT_EQ(std::string(content),
               std::string(reinterpret_cast<char*>(buffer)));
     input.Close();
 
     EXPECT_TRUE(rtc::File::Remove(out_file));
   }
 }
 
 }  // namespace test
 }  // namespace webrtc