webkit: expose webkit branch and revision number in about pages

webkit/build/webkit_version.py

Index: webkit/build/webkit_version.py
diff --git a/webkit/build/webkit_version.py b/webkit/build/webkit_version.py
index 9f8fbabf89fa05d84955ffcebd8a5343a0dcbb8a..62b45623de60f673f2733b70069aceee3ce96862 100755
--- a/webkit/build/webkit_version.py
+++ b/webkit/build/webkit_version.py
@@ -12,6 +12,9 @@ import os
 import re
 import sys
 
+sys.path.insert(0, '../../build/util')
+import lastchange
+
 def ReadVersionFile(fname):
   '''Reads the Webkit Version.xcconfig file looking for MAJOR_VERSION and
      MINOR_VERSION.  This function doesn't attempt to support the full syntax
@@ -41,7 +44,12 @@ def EmitVersionHeader(version_file, output_dir):
   '''Given webkit's version file, emit a header file that we can use from
   within webkit_glue.cc.
   '''
+
   (major, minor) = ReadVersionFile(version_file)
+  (svn_url, svn_revision) = lastchange.FetchChange(
+    default_lastchange=None,
+    directory=os.path.dirname(version_file))
+
   fname = os.path.join(output_dir, "webkit_version.h")
   f = open(fname, 'wb')
   template = """// webkit_version.h
@@ -49,7 +57,8 @@ def EmitVersionHeader(version_file, output_dir):
 
 #define WEBKIT_VERSION_MAJOR %d
 #define WEBKIT_VERSION_MINOR %d
-""" % (version_file, major, minor)
+#define WEBKIT_SVN_REVISION "%s@%s"
+""" % (version_file, major, minor, svn_url, svn_revision)
   f.write(template)
   f.close()