Change the way that gzipped resources are loaded from resources.pak

tools/grit/grit/node/include.py

Index: tools/grit/grit/node/include.py
diff --git a/tools/grit/grit/node/include.py b/tools/grit/grit/node/include.py
index 4bad78594727e45b7f25705336108cfec16866c2..24ef50e79245f779f52a573144b87fae56db7f01 100755
--- a/tools/grit/grit/node/include.py
+++ b/tools/grit/grit/node/include.py
@@ -20,8 +20,6 @@ from grit.node import base
 class IncludeNode(base.Node):
   """An <include> element."""
 
-  RESERVED_HEADER = '\xff\x1f\x8b'
-
   def __init__(self):
     super(IncludeNode, self).__init__()
 
@@ -104,16 +102,6 @@ class IncludeNode(base.Node):
         data = grit.format.gzip_string.GzipStringRsyncable(data)
       else:
         data = grit.format.gzip_string.GzipString(data)
-      data = self.RESERVED_HEADER[0] + data
-    elif data[:3] == self.RESERVED_HEADER:
-      # We are reserving these 3 bytes as the header for gzipped files in the
-      # data pack. 1f:8b is the first two bytes of a gzipped header, and ff is
-      # a custom byte we throw in front of the gzip header so that we prevent
-      # accidentally throwing this error on a resource we gzipped beforehand and
-      # don't wish to compress again. If this exception is hit, change the first
-      # byte of RESERVED_HEADER, and then mirror that update in
-      # ui/base/resource/resource_bundle.h
-      raise exception.ReservedHeaderCollision()
 
     # Include does not care about the encoding, because it only returns binary
     # data.