Dynamically generate a heading for Extension Docs API pages

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

Index: chrome/common/extensions/docs/server2/server_instance.py
diff --git a/chrome/common/extensions/docs/server2/server_instance.py b/chrome/common/extensions/docs/server2/server_instance.py
index 0bf7eb1313aa7c3e22714e9ca3372845c81189a3..db83a09219c63c3879cb75428d34650ede6f751b 100644
--- a/chrome/common/extensions/docs/server2/server_instance.py
+++ b/chrome/common/extensions/docs/server2/server_instance.py
@@ -4,13 +4,14 @@
 
 from fnmatch import fnmatch
 import mimetypes
-import os
 
 from api_data_source import APIDataSource
 from api_list_data_source import APIListDataSource
 from appengine_blobstore import AppEngineBlobstore
 from appengine_url_fetcher import AppEngineUrlFetcher
+from availability_data_source import AvailabilityDataSource
 from branch_utility import BranchUtility
+from chrome_version_utility import ChromeVersionUtility
 from compiled_file_system import CompiledFileSystem
 from example_zipper import ExampleZipper
 from file_system import FileNotFoundError
@@ -48,8 +49,9 @@ class ServerInstance(object):
     if ServerInstance.branch_utility is None:
       ServerInstance.branch_utility = BranchUtility(
           url_constants.OMAHA_PROXY_URL, AppEngineUrlFetcher())
-    branch = ServerInstance.branch_utility.GetBranchNumberForChannelName(
-        channel)
+
+    branch = ServerInstance.branch_utility.GetChannelInfoForChannelName(
+        channel)['branch']
 
     # Use the branch as the key to |_instances| since the branch data is
     # predictable while the channel data (channels can swich branches) isn't.
@@ -113,6 +115,14 @@ class ServerInstance(object):
         svn_file_system,
         object_store_creator_factory)
 
+    self.chrome_version_utility = ChromeVersionUtility(
+        url_constants.OMAHA_DEV_HISTORY,
+        AppEngineUrlFetcher(None))
+
+    self.availability_data_source_factory = AvailabilityDataSource.Factory(
+        self.chrome_version_utility,
+        svn_file_system)
+
     self.api_list_data_source_factory = APIListDataSource.Factory(
         self.compiled_fs_factory,
         svn_constants.API_PATH,
@@ -120,7 +130,8 @@ class ServerInstance(object):
 
     self.api_data_source_factory = APIDataSource.Factory(
         self.compiled_fs_factory,
-        svn_constants.API_PATH)
+        svn_constants.API_PATH,
+        self.availability_data_source_factory)
 
     self.ref_resolver_factory = ReferenceResolver.Factory(
         self.api_data_source_factory,