Moving webrtc/stats/ into webrtc/api/ to resolve a circular dependency

webrtc/BUILD.gn

 # Copyright (c) 2014 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.
 
 # TODO(kjellander): Rebase this to webrtc/build/common.gypi changes after r6330.
 
@@ skipping 238 matching lines @@
     defines = []
 
     deps = [
       ":webrtc_common",
       "audio",
       "base:rtc_base",
       "call",
       "common_audio",
       "common_video",
       "modules",
-      "stats",
       "system_wrappers",
       "tools",
       "video",
       "voice_engine",
     ]
 
     if (build_with_chromium) {
       deps += [ "modules/video_capture" ]
     } else {
       # TODO(kjellander): Enable for Chromium as well when bugs.webrtc.org/4256
@@ skipping 551 matching lines @@
     if (is_mac) {
       sources += [ "base/macsocketserver_unittest.cc" ]
     }
     if (is_clang) {
       # Suppress warnings from the Chromium Clang plugin.
       # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }