Ignore the .git directory in sanitize_source_files, remove .git directory...

R=rmistry@google.com

Review URL: https://codereview.chromium.org/23981006

git-svn-id: http://skia.googlecode.com/svn/trunk@11193 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/sanitize_source_files.py b/tools/sanitize_source_files.py
index c7edaa0..9fd6d32 100755
--- a/tools/sanitize_source_files.py
+++ b/tools/sanitize_source_files.py
@@ -13,7 +13,7 @@
 
 _FILE_EXTENSIONS_TO_SANITIZE = ['cpp', 'h', 'c', 'gyp', 'gypi']
 
-_SUBDIRS_TO_IGNORE = ['.svn', 'third_party']
+_SUBDIRS_TO_IGNORE = ['.git', '.svn', 'third_party']
 
 
 def SanitizeFilesWithModifiers(directory, file_modifiers, line_modifiers):