Moved rtc::Base64 to base approved.

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 73 matching lines @@
 rtc_static_library("rtc_base_approved") {
   defines = []
   libs = []
   deps = []
   all_dependent_configs = [ ":rtc_base_approved_all_dependent_config" ]
 
   sources = [
     "array_view.h",
     "arraysize.h",
     "atomicops.h",
+    "base64.cc",
+    "base64.h",
     "bind.h",
     "bitbuffer.cc",
     "bitbuffer.h",
     "buffer.h",
     "bufferqueue.cc",
     "bufferqueue.h",
     "bytebuffer.cc",
     "bytebuffer.h",
     "byteorder.h",
     "checks.cc",
@@ skipping 275 matching lines @@
     "asyncresolverinterface.cc",
     "asyncresolverinterface.h",
     "asyncsocket.cc",
     "asyncsocket.h",
     "asynctcpsocket.cc",
     "asynctcpsocket.h",
     "asyncudpsocket.cc",
     "asyncudpsocket.h",
     "autodetectproxy.cc",
     "autodetectproxy.h",
-    "base64.cc",
-    "base64.h",
     "common.cc",
     "common.h",
     "crc32.cc",
     "crc32.h",
     "cryptstring.cc",
     "cryptstring.h",
     "diskcache.cc",
     "diskcache.h",
     "filerotatingstream.cc",
     "filerotatingstream.h",
@@ skipping 397 matching lines @@
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
 
     deps = [
       "//base:base_java",
     ]
   }
 }