Include implicit_cast.h at all users of it.

util/net/http_transport_mac.mm

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 #include "util/net/http_transport.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #import <Foundation/Foundation.h>
 
 #include "base/mac/foundation_util.h"
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "third_party/apple_cf/CFStreamAbstract.h"
+#include "util/misc/implicit_cast.h"
 #include "util/net/http_body.h"
 
 namespace crashpad {
 
 namespace {
 
 // An implementation of CFReadStream. This implements the V0 callback
 // scheme.
 class HTTPBodyStreamCFReadStream {
  public:
@@ skipping 181 matching lines @@
 }
 
 }  // namespace
 
 // static
 scoped_ptr<HTTPTransport> HTTPTransport::Create() {
   return scoped_ptr<HTTPTransport>(new HTTPTransportMac());
 }
 
 }  // namespace crashpad