Enable -fPIC by default on x64

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 6d2982ed3ba763eece95472facbdbcfe4b737222..f25bc7b52d532d1e441e972a003bc399f612b404 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -596,10 +596,6 @@
             'test/nacl_security_tests/nacl_security_tests_win.cc',
           ],
         },],
-        # set fPIC for linux in case it isn't set.
-        ['OS=="linux" and (target_arch=="x64" or target_arch=="arm") and linux_fpic!=1', {
-          'cflags': ['-fPIC'],
-        },],
       ],
     },
     {
@@ -2628,10 +2624,8 @@
         },
       ]},  # 'targets'
     ],  # OS=="win"
-    # Build on linux x86_64 only if linux_fpic==1
     ['OS=="mac" or (OS=="win" and component=="static_library") '
-     'or (OS=="linux" and target_arch==python_arch '
-     'and (target_arch!="x64" or linux_fpic==1))', {
+     'or (OS=="linux" and target_arch==python_arch)', {
       'targets': [
         {
           # Documentation: http://dev.chromium.org/developers/testing/pyauto