Revert of Convert the re2 GYP targets to be generated by GN. (https://codereview.chromium.org/68853015/)

Reason for revert:
Broke Blink compile

Original issue's description:
> Convert the re2 GYP targets to be generated by GN.
> 
> BUG=288991
> R=bradnelson@google.com
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245254

TBR=bradnelson@chromium.org,bradnelson@google.com
NOTREECHECKS=true
NOTRY=true
BUG=288991

Review URL: https://codereview.chromium.org/141063002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@245271 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -47,7 +47,6 @@
             '../media/cast/cast.gyp:*',
             '../media/media.gyp:*',
             '../mojo/mojo.gyp:*',
-            '../out/gn_gyp/third_party/re2/re2.gyp:re2',
             '../ppapi/ppapi.gyp:*',
             '../ppapi/ppapi_internal.gyp:*',
             '../printing/printing.gyp:*',
@@ -66,6 +65,7 @@
             '../third_party/npapi/npapi.gyp:*',
             '../third_party/ots/ots.gyp:*',
             '../third_party/qcms/qcms.gyp:*',
+            '../third_party/re2/re2.gyp:re2',
             '../third_party/WebKit/public/all.gyp:*',
             '../tools/gn/gn.gyp:*',
             '../tools/perf/clear_system_cache/clear_system_cache.gyp:*',