AU: Class to perform delta updates.

src/platform/update_engine/SConstruct

Index: src/platform/update_engine/SConstruct
diff --git a/src/platform/update_engine/SConstruct b/src/platform/update_engine/SConstruct
index 41dc94f8796027cfc9eec8f095ecc718c9f80920..f8ca95b3385d7f50642184f6f8414f241d82daf8 100644
--- a/src/platform/update_engine/SConstruct
+++ b/src/platform/update_engine/SConstruct
@@ -107,7 +107,7 @@ sources = Split("""action_processor.cc
                    bzip_extent_writer.cc
                    cycle_breaker.cc
                    decompressing_file_writer.cc
-                   delta_diff_parser.cc
+                   delta_performer.cc
                    download_action.cc
                    extent_mapper.cc
                    extent_writer.cc
@@ -137,6 +137,7 @@ unittest_sources = Split("""action_unittest.cc
                             cycle_breaker_unittest.cc
                             decompressing_file_writer_unittest.cc
                             delta_diff_generator_unittest.cc
+                            delta_performer_unittest.cc
                             download_action_unittest.cc
                             extent_mapper_unittest.cc
                             extent_writer_unittest.cc
@@ -162,17 +163,11 @@ unittest_main = ['testrunner.cc']
 delta_generator_sources = Split("""delta_diff_generator.cc""")
 delta_generator_main = ['generate_delta_main.cc']
 
-test_installer_main = ['test_installer_main.cc']
-
 env.Program('update_engine', sources + main)
 unittest_cmd = env.Program('update_engine_unittests',
                            sources + delta_generator_sources +
                            unittest_sources + unittest_main)
 
-test_installer_cmd = env.Program('test_installer',
-                                 sources + delta_generator_sources +
-                                 unittest_sources + test_installer_main)
-
 Clean(unittest_cmd, Glob('*.gcda') + Glob('*.gcno') + Glob('*.gcov') +
                     Split('html app.info'))