Reverting 23343.

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 23371)
+++ build/common.gypi	(working copy)
@@ -94,6 +94,12 @@
 
     'chromeos%': 0,
 
+    # Whether or not browser sync code is built in.
+    'chrome_personalization%': 1,
+
+    # Used to build and statically link a stub (no-op) syncapi engine.
+    'use_syncapi_stub%' : 1,
+
     # Set the restrictions on the SUID sandbox binary.
     #  Path: only exec the hard coded chrome binary path
     #  User: only exec binaries owned by the running user.
@@ -177,6 +183,17 @@
       ['chromeos==1', {
         'defines': ['OS_CHROMEOS=1'],
       }],
+      ['chrome_personalization==1', {
+        'conditions': [
+         ['OS=="win"', {
+           # For now sync is only enabled on windows.
+           'defines': ['CHROME_PERSONALIZATION=1'],
+         }],  # OS==win
+        ],  # conditions for chrome_personalization
+      }],  # chrome_personalization==1
+      ['use_syncapi_stub==1', {
+       'defines': ['COMPILING_SYNCAPI_STUB'],
+      }],  # use_syncapi_stub==1
       ['coverage!=0', {
         'conditions': [
           ['OS=="mac"', {