Differential updates for components.

chrome/installer/util/util_constants.cc

Index: chrome/installer/util/util_constants.cc
===================================================================
--- chrome/installer/util/util_constants.cc	(revision 201835)
+++ chrome/installer/util/util_constants.cc	(working copy)
@@ -196,6 +196,17 @@
 // to. See DuplicateGoogleUpdateSystemClientKey for details.
 const char kToastResultsKey[] = "toast-results-key";
 
+// Applies a binary patch to a file. The input, patch, and the output file are
+// specified as command line arguments following the --patch switch.
+// Ex: --patch=courgette --input_file='input' --patch_file='patch'
+//        --output_file='output'
+const char kPatch[] = "patch";
+const char kCourgette[] = "courgette";
+const char kBsdiff[] = "bsdiff";
+const char kInputFile[] = "input-file";
+const char kPatchFile[] = "patch-file";
+const char kOutputFile[] = "output-file";
+
 }  // namespace switches
 
 // The Active Setup executable will be an identical copy of setup.exe; this is