Fix compiling of sync on linux.

chrome/browser/sync/util/pthread_helpers.cc

 // Copyright (c) 2009 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 "chrome/browser/sync/util/pthread_helpers.h"
 
 #if (defined(OS_LINUX) || defined(OS_MACOSX))
 #include <sys/time.h>
 #endif   // (defined(OS_LINUX) || defined(OS_MACOSX))
 
@@ skipping 115 matching lines @@
   struct timespec deadline = { now.tv_sec };
   // microseconds to nanoseconds.
   // and add the ms delay.
   ms += now.tv_usec / 1000;
   deadline.tv_sec += ms / 1000;
   deadline.tv_nsec = (ms % 1000) * 1000000;
   return deadline;
 #endif  // OS_WIN
 }
 
-void NameCurrentThreadForDebugging(char* name) {
+void NameCurrentThreadForDebugging(const char* name) {
 #if defined(OS_WIN)
   // This implementation is taken from Chromium's platform_thread framework.
   // The information on how to set the thread name comes from a MSDN article:
   // http://msdn2.microsoft.com/en-us/library/xcb2z8hs.aspx
   const DWORD kVCThreadNameException = 0x406D1388;
   typedef struct tagTHREADNAME_INFO {
     DWORD dwType;  // Must be 0x1000.
     LPCSTR szName;  // Pointer to name (in user addr space).
     DWORD dwThreadID;  // Thread ID (-1=caller thread).
     DWORD dwFlags;  // Reserved for future use, must be zero.
   } THREADNAME_INFO;
 
   // The debugger needs to be around to catch the name in the exception. If
   // there isn't a debugger, we are just needlessly throwing an exception.
   if (!::IsDebuggerPresent())
     return;
 
   THREADNAME_INFO info = { 0x1000, name, GetCurrentThreadId(), 0 };
 
   __try {
     RaiseException(kVCThreadNameException, 0, sizeof(info)/sizeof(DWORD),
                    reinterpret_cast<DWORD_PTR*>(&info));
   } __except(EXCEPTION_CONTINUE_EXECUTION) {
   }
 #endif  // defined(OS_WIN)
 }