Dynamically generate a heading for Extension Docs API pages

chrome/common/extensions/docs/server2/patch_servlet.py

Index: chrome/common/extensions/docs/server2/patch_servlet.py
diff --git a/chrome/common/extensions/docs/server2/patch_servlet.py b/chrome/common/extensions/docs/server2/patch_servlet.py
index 008644554e8d22f0642dc55d3e57cca2367d44a5..f32ea7db4f34afc56f9beb86030eaac16502e591 100644
--- a/chrome/common/extensions/docs/server2/patch_servlet.py
+++ b/chrome/common/extensions/docs/server2/patch_servlet.py
@@ -19,6 +19,7 @@ from object_store_creator import ObjectStoreCreator
 from patched_file_system import PatchedFileSystem
 from server_instance import ServerInstance
 from servlet import Request, Response, Servlet
+from subversion_file_system import SubversionFileSystem
 import svn_constants
 import url_constants
 
@@ -53,13 +54,17 @@ class _PatchServletDelegate(RenderServlet.Delegate):
     compiled_fs_factory = ChainedCompiledFileSystem.Factory(
         [(patched_compiled_fs_factory, patched_file_system),
          (base_compiled_fs_factory, base_file_system)])
+    def create_file_system(branch):
+      return CachingFileSystem(SubversionFileSystem.Create(branch),
+                               object_store_creator)
     return ServerInstance(channel,
                           object_store_creator,
                           patched_file_system,
                           self._delegate.CreateAppSamplesFileSystem(
                               base_object_store_creator),
                           '/_patch/%s/static' % self._issue,
-                          compiled_fs_factory)
+                          compiled_fs_factory,
+                          create_file_system)
 
 class PatchServlet(Servlet):
   '''Servlet which renders patched docs.