Style fix for member variable.

content/browser/trace_subscriber_stdio.cc

 // Copyright (c) 2011 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/trace_subscriber_stdio.h"
 
 #include "base/logging.h"
 
 TraceSubscriberStdio::TraceSubscriberStdio(const FilePath& path) {
   LOG(INFO) << "Logging performance trace to file: " << path.value();
-  m_file = file_util::OpenFile(path, "w+");
+  file_ = file_util::OpenFile(path, "w+");
   if (IsValid()) {
     // FIXME: the file format expects it to start with "[".
-    fputc('[', m_file);
+    fputc('[', file_);
   } else {
     LOG(ERROR) << "Failed to open performance trace file: " << path.value();
   }
 }
 
 TraceSubscriberStdio::~TraceSubscriberStdio() {
   OnEndTracingComplete();
 }
 
 bool TraceSubscriberStdio::IsValid() {
-  return m_file && (0 == ferror(m_file));
+  return file_ && (0 == ferror(file_));
 }
 
 void TraceSubscriberStdio::OnEndTracingComplete() {
-  if (m_file) {
+  if (file_) {
     // FIXME: the file format expects it to end with "]".
-    fputc(']', m_file);
-    fclose(m_file);
-    m_file = 0;
+    fputc(']', file_);
+    fclose(file_);
+    file_ = 0;
   }
 }
 
 void TraceSubscriberStdio::OnTraceDataCollected(
     const std::string& json_events) {
   if (!IsValid()) {
     return;
   }
 
   // FIXME: "json_events" currently comes with "[" and "]". But the file doesn't
   // expect them. So remove them when writing to the file.
   CHECK_GE(json_events.size(), 2u);
   const char* data = json_events.data() + 1;
   size_t size = json_events.size() - 2;
 
-  size_t written = fwrite(data, 1, size, m_file);
+  size_t written = fwrite(data, 1, size, file_);
   if (written != size) {
-    LOG(ERROR) << "Error " << ferror(m_file) << " when writing to trace file";
-    fclose(m_file);
-    m_file = 0;
+    LOG(ERROR) << "Error " << ferror(file_) << " when writing to trace file";
+    fclose(file_);
+    file_ = 0;
   } else {
-    fputc(',', m_file);
+    fputc(',', file_);
   }
 }