Cleanup: Add a const variable for /proc/self/exe.

chrome/test/base/chrome_test_suite.cc

 // 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.
 
 #include "chrome/test/base/chrome_test_suite.h"
 
 #if defined(OS_CHROMEOS)
 #include <stdio.h>
 #include <unistd.h>
 #endif
@@ skipping 43 matching lines @@
   // on disk.
 #if defined(OS_POSIX)
   base::SharedMemory memory;
   memory.Delete(filename);
 #endif
 }
 
 bool IsCrosPythonProcess() {
 #if defined(OS_CHROMEOS)
   char buf[80];
-  int num_read = readlink("/proc/self/exe", buf, sizeof(buf) - 1);
+  int num_read = readlink(base::kProcSelfExe, buf, sizeof(buf) - 1);
   if (num_read == -1)
     return false;
   buf[num_read] = 0;
   const char kPythonPrefix[] = "/python";
   return !strncmp(strrchr(buf, '/'), kPythonPrefix, sizeof(kPythonPrefix) - 1);
+#else
+  return false;
 #endif  // defined(OS_CHROMEOS)
-  return false;
 }
 
 // In many cases it may be not obvious that a test makes a real DNS lookup.
 // We generally don't want to rely on external DNS servers for our tests,
 // so this host resolver procedure catches external queries and returns a failed
 // lookup result.
 class LocalHostResolverProc : public net::HostResolverProc {
  public:
   LocalHostResolverProc() : HostResolverProc(NULL) {}
 
@@ skipping 164 matching lines @@
 #if defined(OS_MACOSX)
   base::mac::SetOverrideFrameworkBundle(NULL);
 #endif
 
   base::StatsTable::set_current(NULL);
   stats_table_.reset();
   RemoveSharedMemoryFile(stats_filename_);
 
   base::TestSuite::Shutdown();
 }