[DevTools] Filter any messages from previous sessions in DevToolsAgentHostImpl

content/browser/devtools/protocol/io_handler.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/protocol/io_handler.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/files/file.h"
@@ skipping 14 matching lines @@
     : io_context_(io_context)
     , weak_factory_(this) {}
 
 IOHandler::~IOHandler() {}
 
 void IOHandler::SetClient(scoped_ptr<Client> client) {
   client_.swap(client);
 }
 
 Response IOHandler::Read(DevToolsCommandId command_id,
-    const std::string& handle, const int* offset, const int* max_size) {
+                         const std::string& handle,
+                         const int* offset,
+                         const int* max_size) {
   static const size_t kDefaultChunkSize = 10 * 1024 * 1024;
 
   scoped_refptr<DevToolsIOContext::Stream> stream =
       io_context_->GetByHandle(handle);
   if (!stream)
     return Response::InvalidParams("Invalid stream handle");
   stream->Read(offset ? *offset : -1,
                max_size && *max_size ? *max_size : kDefaultChunkSize,
-               base::Bind(&IOHandler::ReadComplete,
-                          weak_factory_.GetWeakPtr(), command_id));
+               base::Bind(&IOHandler::ReadComplete, weak_factory_.GetWeakPtr(),
+                          command_id));
   return Response::OK();
 }
 
 void IOHandler::ReadComplete(DevToolsCommandId command_id,
                              const scoped_refptr<base::RefCountedString>& data,
                              int status) {
   if (status == DevToolsIOContext::Stream::StatusFailure) {
     client_->SendError(command_id, Response::ServerError("Read failed"));
     return;
   }
   bool eof = status == DevToolsIOContext::Stream::StatusEOF;
-  client_->SendReadResponse(command_id,
-      ReadResponse::Create()->set_data(data->data())->set_eof(eof));
+  client_->SendReadResponse(
+      command_id, ReadResponse::Create()->set_data(data->data())->set_eof(eof));
 }
 
 Response IOHandler::Close(const std::string& handle) {
   return io_context_->Close(handle) ? Response::OK()
       : Response::InvalidParams("Invalid stream handle");
 }
 
 }  // namespace io
 }  // namespace devtools
 }  // namespace content