[DevTools] Move IO and Tracing to new generator.

content/browser/devtools/devtools_io_context.cc

 // Copyright 2015 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/browser/devtools/devtools_io_context.h"
 
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/third_party/icu/icu_utf.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace content {
-namespace devtools {
 
 namespace {
 unsigned s_last_stream_handle = 0;
 }
 
 using Stream = DevToolsIOContext::Stream;
 
 Stream::Stream()
     : base::RefCountedDeleteOnMessageLoop<Stream>(
           BrowserThread::GetTaskRunnerForThread(BrowserThread::FILE)),
@@ skipping 107 matching lines @@
 }
 
 bool DevToolsIOContext::Close(const std::string& handle) {
   return streams_.erase(handle) == 1;
 }
 
 void DevToolsIOContext::DiscardAllStreams() {
   return streams_.clear();
 }
 
-}  // namespace devtools
 }  // namespace content