Renamed WebRTCStats.h to WebRTCLegacyStats.h and cleaned it up

content/renderer/media/rtc_peer_connection_handler_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/media/rtc_peer_connection_handler.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 55 matching lines @@
   message_loop->task_runner()->PostTask(FROM_HERE, quit_closure);
 }
 
 class MockRTCStatsResponse : public LocalRTCStatsResponse {
  public:
   MockRTCStatsResponse()
       : report_count_(0),
         statistic_count_(0) {
   }
 
-  void addStats(const blink::WebRTCStats& stats) override {
+  void addStats(const blink::WebRTCLegacyStats& stats) override {
     ++report_count_;
-    for (std::unique_ptr<blink::WebRTCStatsMemberIterator> member(
+    for (std::unique_ptr<blink::WebRTCLegacyStatsMemberIterator> member(
              stats.iterator());
          !member->isEnd(); member->next()) {
       ++statistic_count_;
     }
   }
 
   int report_count() const { return report_count_; }
 
  private:
   int report_count_;
@@ skipping 969 matching lines @@
                                     testing::Ref(tracks[0])));
 
   std::unique_ptr<blink::WebRTCDTMFSenderHandler> sender(
       pc_handler_->createDTMFSender(tracks[0]));
   EXPECT_TRUE(sender.get());
 
   StopAllTracks(local_stream);
 }
 
 }  // namespace content