Changing the order of initialization WeakPtrFactory

content/shell/renderer/ipc_echo.cc

 // 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.
 
 #include "content/shell/renderer/ipc_echo.h"
 
 #include "base/logging.h"
 #include "content/shell/common/shell_messages.h"
 #include "content/shell/renderer/binding_helpers.h"
 #include "gin/object_template_builder.h"
@@ skipping 64 matching lines @@
                               blink::WebFrame* frame) {
   std::vector<std::string> names;
   names.push_back("ipcEcho");
   return InstallAsWindowProperties(
       new IPCEchoBindings(echo), frame, names);
 }
 
 IPCEcho::IPCEcho(blink::WebDocument document,
                  IPC::Sender* sender,
                  int routing_id)
-    : weak_factory_(this),
-      document_(document), sender_(sender), routing_id_(routing_id),
-      last_echo_id_(0) {
+    : document_(document), sender_(sender), routing_id_(routing_id),
+      last_echo_id_(0),
+      weak_factory_(this) {
 }
 
 IPCEcho::~IPCEcho() {
 }
 
 void IPCEcho::RequestEcho(int id, int size) {
   sender_->Send(new ShellViewHostMsg_EchoPing(
       routing_id_, id, std::string(size, '*')));
 }
 
 void IPCEcho::DidRespondEcho(int id, int size) {
   last_echo_id_ = id;
   last_echo_size_ = size;
   blink::WebString eventName = blink::WebString::fromUTF8("CustomEvent");
   blink::WebString eventType = blink::WebString::fromUTF8("pong");
   blink::WebDOMEvent event = document_.createEvent(eventName);
   event.to<blink::WebDOMCustomEvent>().initCustomEvent(
       eventType, false, false, blink::WebSerializedScriptValue());
   document_.dispatchEvent(event);
 }
 
 void IPCEcho::Install(blink::WebFrame* frame) {
   IPCEchoBindings::Install(weak_factory_.GetWeakPtr(), frame);
 }
 
 }  // namespace content