Revert 112034 - Add win_shared and linux_shared builder into the default try bot set.

Component builds breakages are easy to introduce because you can accidentally add a cross-component dependency without any warning if you're doing a normal static build.

BUG=105750
TEST=none

Review URL: http://codereview.chromium.org/8726043

TBR=ajwong@chromium.org
Review URL: http://codereview.chromium.org/8762005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@112317 0039d316-1c4b-4281-b951-d872f2087c98

PRESUBMIT.py

@@ -333,4 +333,4 @@ def GetPreferredTrySlaves(project, change):
       f.LocalPath().endswith(('.mm', '.m')) for f in change.AffectedFiles())
   if only_objc_files:
     return ['mac']
-  return ['win', 'linux', 'mac', 'win_shared', 'linux_shared']
+  return ['win', 'linux', 'mac']