Build browser/sync files by default using a stubbed-out syncapi

implementation.  The stub will be replaced once the rest of
sync/engine lands as we open source the sync engine code.

Review URL: http://codereview.chromium.org/165257

git-svn-id: http://src.chromium.org/svn/trunk/src/build@23004 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -94,7 +94,11 @@
 
     'chromeos%': 0,
 
-    'chrome_personalization%': 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
@@ -180,8 +184,16 @@
         'defines': ['OS_CHROMEOS=1'],
       }],
       ['chrome_personalization==1', {
-        'defines': ['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"', {