Remove PRODUCT_STRING_PATH from chrome_constants.h on Windows.

chrome/chrome_common.gypi

Index: chrome/chrome_common.gypi
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index c53545f99775c9f265f839206e3b1415eeb822b8..bc944ea55e63a5c3b53ec6fdabef8edaf898279a 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -656,5 +656,18 @@
         '../skia/skia.gyp:skia_mojo',
       ],
     },
+    {
+      # GN version: //chrome/common:metrics_constants_util_win

[grt (UTC plus 2), 2016/04/15 15:29:32]

i think it's entirely appropriate to put this in an OS=="win" conditional

[gab, 2016/04/15 18:14:06]

Didn't initially think that was the right way but gave it a shot now in latest
patch set.

+      'target_name': 'metrics_constants_util_win',
+      'type': 'static_library',
+      'sources': [
+        'common/metrics_constants_util_win.cc',
+        'common/metrics_constants_util_win.h',
+      ],
+      'dependencies': [
+        'installer_util',
+        '../base/base.gyp:base',
+      ],
+    },
   ],
 }