Fixes for -Wunused-function on Linux, Android and ChromeOS

base/security_unittest.cc

 // Copyright (c) 2013 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 <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ skipping 212 matching lines @@
   } else {
     // It's also ok for calloc to just terminate the process.
 #if defined(GTEST_HAS_DEATH_TEST)
     EXPECT_DEATH(CallocReturnsNull(kArraySize, kArraySize2), "");
     EXPECT_DEATH(CallocReturnsNull(kArraySize2, kArraySize), "");
 #endif  // GTEST_HAS_DEATH_TEST
   }
 }
 
 #if (defined(OS_LINUX) || defined(OS_CHROMEOS)) && defined(__x86_64__)
-// Useful for debugging.
-void PrintProcSelfMaps() {
-  int fd = open("/proc/self/maps", O_RDONLY);
-  file_util::ScopedFD fd_closer(&fd);
-  ASSERT_GE(fd, 0);
-  char buffer[1<<13];
-  int ret;
-  ret = read(fd, buffer, sizeof(buffer) - 1);
-  ASSERT_GT(ret, 0);
-  buffer[ret - 1] = 0;
-  fprintf(stdout, "%s\n", buffer);
-}
-
 // Check if ptr1 and ptr2 are separated by less than size chars.
 bool ArePointersToSameArea(void* ptr1, void* ptr2, size_t size) {
   ptrdiff_t ptr_diff = reinterpret_cast<char*>(std::max(ptr1, ptr2)) -
                        reinterpret_cast<char*>(std::min(ptr1, ptr2));
   return static_cast<size_t>(ptr_diff) <= size;
 }
 
 // Check if TCMalloc uses an underlying random memory allocator.
 TEST(SecurityTest, TCMALLOC_TEST(RandomMemoryAllocations)) {
   if (IsTcMallocBypassed())
@@ skipping 38 matching lines @@
   // kRandomMask, so we use it as an additional detection mechanism.
   const uintptr_t kRandomMask = 0x3fffffffffffULL;
   bool impossible_random_address =
       reinterpret_cast<uintptr_t>(ptr.get()) & ~kRandomMask;
   EXPECT_FALSE(impossible_random_address);
 }
 
 #endif  // (defined(OS_LINUX) || defined(OS_CHROMEOS)) && defined(__x86_64__)
 
 }  // namespace