replace NULL->nullptr in src/remoting.

remoting/host/mac/me2me_preference_pane.mm

 // Copyright (c) 2012 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.
 
 #import "remoting/host/mac/me2me_preference_pane.h"
 
 #import <Cocoa/Cocoa.h>
 #include <CommonCrypto/CommonHMAC.h>
 #include <errno.h>
 #include <launch.h>
@@ skipping 84 matching lines @@
 // These methods are copied from base/mac, but with the logging changed to use
 // NSLog().
 //
 // TODO(lambroslambrou): Once the "base" target supports building for 64-bit
 // on Mac OS X, remove these implementations and use the ones in base/mac.
 namespace base {
 namespace mac {
 
 // MessageForJob sends a single message to launchd with a simple dictionary
 // mapping |operation| to |job_label|, and returns the result of calling
-// launch_msg to send that message. On failure, returns NULL. The caller
+// launch_msg to send that message. On failure, returns nullptr. The caller
 // assumes ownership of the returned launch_data_t object.
 launch_data_t MessageForJob(const std::string& job_label,
                             const char* operation) {
   // launch_data_alloc returns something that needs to be freed.
   ScopedLaunchData message(launch_data_alloc(LAUNCH_DATA_DICTIONARY));
   if (!message) {
     NSLog(@"launch_data_alloc");
-    return NULL;
+    return nullptr;
   }
 
   // launch_data_new_string returns something that needs to be freed, but
   // the dictionary will assume ownership when launch_data_dict_insert is
   // called, so put it in a scoper and .release() it when given to the
   // dictionary.
   ScopedLaunchData job_label_launchd(launch_data_new_string(job_label.c_str()));
   if (!job_label_launchd) {
     NSLog(@"launch_data_new_string");
-    return NULL;
+    return nullptr;
   }
 
   if (!launch_data_dict_insert(message,
                                job_label_launchd.release(),
                                operation)) {
-    return NULL;
+    return nullptr;
   }
 
   return launch_msg(message);
 }
 
 pid_t PIDForJob(const std::string& job_label) {
   ScopedLaunchData response(MessageForJob(job_label, LAUNCH_KEY_GETJOB));
   if (!response) {
     return -1;
   }
@@ skipping 20 matching lines @@
 
   return launch_data_get_integer(pid_data);
 }
 
 OSStatus ExecuteWithPrivilegesAndGetPID(AuthorizationRef authorization,
                                         const char* tool_path,
                                         AuthorizationFlags options,
                                         const char** arguments,
                                         FILE** pipe,
                                         pid_t* pid) {
-  // pipe may be NULL, but this function needs one.  In that case, use a local
-  // pipe.
+  // pipe may be nullptr, but this function needs one.  In that case, use a
+  // local pipe.
   FILE* local_pipe;
   FILE** pipe_pointer;
   if (pipe) {
     pipe_pointer = pipe;
   } else {
     pipe_pointer = &local_pipe;
   }
 
   // AuthorizationExecuteWithPrivileges wants |char* const*| for |arguments|,
   // but it doesn't actually modify the arguments, and that type is kind of
@@ skipping 13 matching lines @@
   char* line_c = fgetln(*pipe_pointer, &line_length);
   if (line_c) {
     if (line_length > 0 && line_c[line_length - 1] == '\n') {
       // line_c + line_length is the start of the next line if there is one.
       // Back up one character.
       --line_length;
     }
     std::string line(line_c, line_length);
 
     // The version in base/mac used base::StringToInt() here.
-    line_pid = strtol(line.c_str(), NULL, 10);
+    line_pid = strtol(line.c_str(), nullptr, 10);
     if (line_pid == 0) {
       NSLog(@"ExecuteWithPrivilegesAndGetPid: funny line: %s", line.c_str());
       line_pid = -1;
     }
   } else {
     NSLog(@"ExecuteWithPrivilegesAndGetPid: no line");
   }
 
   if (!pipe) {
     fclose(*pipe_pointer);
@@ skipping 330 matching lines @@
   AuthorizationRef authorization =
       [[authorization_view_ authorization] authorizationRef];
   if (!authorization) {
     NSLog(@"Failed to obtain authorizationRef");
     return NO;
   }
 
   // TODO(lambroslambrou): Replace the deprecated ExecuteWithPrivileges
   // call with a launchd-based helper tool, which is more secure.
   // http://crbug.com/120903
-  const char* arguments[] = { command, NULL };
-  FILE* pipe = NULL;
+  const char* arguments[] = { command, nullptr };
+  FILE* pipe = nullptr;
   pid_t pid;
   OSStatus status = base::mac::ExecuteWithPrivilegesAndGetPID(
       authorization,
       remoting::kHostHelperScriptPath,
       kAuthorizationFlagDefaults,
       arguments,
       &pipe,
       &pid);
   if (status != errAuthorizationSuccess) {
     NSLog(@"AuthorizationExecuteWithPrivileges: %s (%d)",
           GetMacOSStatusErrorString(status), static_cast<int>(status));
     return NO;
   }
   if (pid == -1) {
     NSLog(@"Failed to get child PID");
     if (pipe)
       fclose(pipe);
 
     return NO;
   }
   if (!pipe) {
-    NSLog(@"Unexpected NULL pipe");
+    NSLog(@"Unexpected nullptr pipe");
     return NO;
   }
 
   // Some cleanup is needed (closing the pipe and waiting for the child
   // process), so flag any errors before returning.
   BOOL error = NO;
 
   if (!input_data.empty()) {
     size_t bytes_written = fwrite(input_data.data(), sizeof(char),
                                   input_data.size(), pipe);
@@ skipping 163 matching lines @@
   NSArray* arguments = [NSArray arrayWithObjects:@"--relaunch-prefpane", nil];
   [task setLaunchPath:command];
   [task setArguments:arguments];
   [task setStandardInput:[NSPipe pipe]];
   [task launch];
   [task release];
   [NSApp terminate:nil];
 }
 
 @end