Move base64url.* to CryptAuth component.

components/proximity_auth.gypi

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       'target_name': 'proximity_auth',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../device/bluetooth/bluetooth.gyp:device_bluetooth',
         '../net/net.gyp:net',
       ],
       'sources': [
-        "proximity_auth/base64url.cc",
-        "proximity_auth/base64url.h",
         "proximity_auth/bluetooth_connection.cc",
         "proximity_auth/bluetooth_connection.h",
         "proximity_auth/bluetooth_connection_finder.cc",
         "proximity_auth/bluetooth_connection_finder.h",
         "proximity_auth/bluetooth_util.cc",
         "proximity_auth/bluetooth_util.h",
         "proximity_auth/bluetooth_util_chromeos.cc",
         "proximity_auth/client.cc",
         "proximity_auth/client.h",
         "proximity_auth/client_observer.h",
@@ skipping 33 matching lines @@
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         'cryptauth_proto',
         '../base/base.gyp:base',
         '../google_apis/google_apis.gyp:google_apis',
         '../net/net.gyp:net',
       ],
       'sources': [
+        "proximity_auth/cryptauth/base64url.cc",
+        "proximity_auth/cryptauth/base64url.h",
         "proximity_auth/cryptauth/cryptauth_access_token_fetcher.h",
         "proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl.cc",
         "proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl.h",
         "proximity_auth/cryptauth/cryptauth_api_call_flow.cc",
         "proximity_auth/cryptauth/cryptauth_api_call_flow.h",
         "proximity_auth/cryptauth/cryptauth_client.h",
         "proximity_auth/cryptauth/cryptauth_client_impl.cc",
         "proximity_auth/cryptauth/cryptauth_client_impl.h",
         "proximity_auth/cryptauth/cryptauth_enrollment_utils.cc",
         "proximity_auth/cryptauth/cryptauth_enrollment_utils.h",
@@ skipping 17 matching lines @@
       'sources': [
         "proximity_auth/cryptauth/fake_secure_message_delegate.cc",
         "proximity_auth/cryptauth/fake_secure_message_delegate.h",
       ],
       'export_dependent_settings': [
         'cryptauth_proto',
       ],
     },
   ],
 }