Revert 245563 and 245800 which made re2 GN generated.

This change keeps the BUILD file in the new location and does not resort the .gyp files to facilitate relanding.

TBR=thakis
BUG=

Review URL: https://codereview.chromium.org/132693017

git-svn-id: http://src.chromium.org/svn/trunk/src/build@246255 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

all.gyp

@@ -35,7 +35,7 @@
       'conditions': [
         ['OS!="ios"', {
           'dependencies': [
-            '../<(gyp_output_dir)/gn_gyp/third_party/re2/re2.gyp:re2',
+            '../third_party/re2/re2.gyp:re2',
             '../cc/cc_tests.gyp:*',
             '../device/bluetooth/bluetooth.gyp:*',
             '../device/device_tests.gyp:*',