Drop NaCl dependencies on platforms where disable_nacl=1.

chrome/common_constants.gyp

Index: chrome/common_constants.gyp
diff --git a/chrome/common_constants.gyp b/chrome/common_constants.gyp
index 380e075ab606bc079a1ef44a6b637b3000d45312..9725cada7c488d8503667ab1520fc427b965ebf1 100644
--- a/chrome/common_constants.gyp
+++ b/chrome/common_constants.gyp
@@ -72,7 +72,6 @@
         '../base/base.gyp:base',
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../components/components.gyp:bookmarks_common',
-        '../components/nacl.gyp:nacl_switches',
         '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
       ],
       'target_conditions': [
@@ -84,6 +83,13 @@
           ],
         }],
       ],
+      'conditions': [
+        ['disable_nacl==0', {
+          'dependencies': [
+            '../components/nacl.gyp:nacl_switches',
+          ],
+        }],
+      ],
     },
   ],
   'conditions': [