Introduce rtc::ArrayView<T>, which keeps track of an array that it doesn't own

webrtc/base/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.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 76 matching lines @@
     include_dirs = [ rtc_ssl_root ]
   }
 }
 
 # The subset of rtc_base approved for use outside of libjingle.
 static_library("rtc_base_approved") {
   configs += [ "..:common_config" ]
   public_configs = [ "..:common_inherited_config" ]
 
   sources = [
+    "array_view.h",
     "atomicops.h",
     "bitbuffer.cc",
     "bitbuffer.h",
     "buffer.cc",
     "buffer.h",
     "bufferqueue.cc",
     "bufferqueue.h",
     "bytebuffer.cc",
     "bytebuffer.h",
     "byteorder.h",
@@ skipping 476 matching lines @@
       "linux.cc",
       "linux.h",
     ]
   }
 
   if (is_nacl) {
     deps += [ "//native_client_sdk/src/libraries/nacl_io" ]
     defines += [ "timezone=_timezone" ]
   }
 }