linux: enable PIE (ASLR) for chrome executable

chrome/chrome_exe.gypi

Index: chrome/chrome_exe.gypi
diff --git a/chrome/chrome_exe.gypi b/chrome/chrome_exe.gypi
index a2f0a4991d348ee8a9380a8c896ddc0438f2b96e..bcdf7e6c1b209379062008ee457d70c7b9d18381 100644
--- a/chrome/chrome_exe.gypi
+++ b/chrome/chrome_exe.gypi
@@ -194,11 +194,21 @@
                 ],
               },
             ],
-            # 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': [