Remove hooks until Windows performance issues are sorted.

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index 67d68674e04fd5f0c42084529551a1fa35c181f5..119bdc175b213b17d8d6615b72f288f76a2ecd2b 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -308,6 +308,14 @@ class GitWrapper(SCMWrapper):
       files = self._Capture(['ls-files']).splitlines()
       file_list.extend([os.path.join(self.checkout_path, f) for f in files])
 
+  def _DisableHooks(self):
+    hook_dir = os.path.join(self.checkout_path, '.git', 'hooks')
+    if not os.path.isdir(hook_dir):
+      return
+    for f in os.listdir(hook_dir):
+      if not f.endswith('.sample'):
+        os.remove(os.path.join(hook_dir, f))
+
   def update(self, options, args, file_list):
     """Runs git to update or transparently checkout the working copy.
 
@@ -321,6 +329,8 @@ class GitWrapper(SCMWrapper):
 
     self._CheckMinVersion("1.6.6")
 
+    self._DisableHooks()
+
     # If a dependency is not pinned, track the default remote branch.
     default_rev = 'refs/remotes/%s/master' % self.remote
     url, deps_revision = gclient_utils.SplitUrlRevision(self.url)