linux: enable PIE (ASLR) for chrome executable

chrome/chrome_exe.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'chrome_exe_target': 0,
     },
     'target_conditions': [
@@ skipping 176 matching lines @@
               'message': 'Generating manpage'
             },
           ],
           'conditions': [
             ['linux_use_tcmalloc==1', {
                 'dependencies': [
                   '<(allocator_target)',
                 ],
               },
             ],
-            # TODO(rkc): Remove this once we have a fix for remote gdb
-            # and are able to correctly get section header offsets for
-            # pie executables. Currently -pie breaks remote debugging.
+            # TODO(rkc): Remove disable_pie (and instead always use
+            # -pie) once we have a fix for remote gdb and are able to
+            # correctly get section header offsets for pie
+            # executables. Currently -pie breaks remote debugging.
             ['disable_pie==1', {
-              'ldflags' : ['-nopie'],
+              'ldflags': ['-nopie'],
+            }, {
+              # Building with -fPIE fails on ARM and ia32 bots.
+              # http://code.google.com/p/chromium/issues/detail?id=57908
+              # Until that is fixed, at least use it on other platforms.
+              'conditions': [
+                ['target_arch!="arm" and target_arch!="ia32"', {
+                  'ldflags': ['-pie'],
+                }],
+              ],
             }],
             ['use_system_xdg_utils==0', {
               'copies': [
                 {
                   'destination': '<(PRODUCT_DIR)',
                   'files': ['tools/build/linux/chrome-wrapper',
                             '../third_party/xdg-utils/scripts/xdg-mime',
                             '../third_party/xdg-utils/scripts/xdg-settings',
                             ],
                   # The wrapper script above may need to generate a .desktop
@@ skipping 316 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }