[Zucchini] Move Zucchini from /chrome/installer/ to /components/.

(Use "git log --follow" to see older revisions of files).

/components/ is the most logical place to put Zucchini, which only
depends on /base and /testing/gtest. This move also enables Zucchini to
be used by the Component Updater. Details:
- Move all files; run the following to change deps and guards:
  sed 's/chrome\/installer/components/' *.cc *.h -i
  sed 's/CHROME_INSTALLER/COMPONENTS/' *.cc *.h -i
  - Sorting works out pretty well!
- Change all 'chrome/installer/zucchini' to 'components/zucchini'
  throughout other parts of the repo; sort if necessary.
- Fix 6 'git cl lint' errors.
- Change 1 Bind() usage to BindRepeated().
- Update OWNER.

Bug: 729154
Change-Id: I50c5a7d411ea85f707b5994ab319dfb2a1acccf7
Reviewed-on: https://chromium-review.googlesource.com/954923
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Samuel Huang <huangs@chromium.org>
Commit-Queue: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542857}
NOKEYCHECK=True
GitOrigin-RevId: 577ef6c435e8d43be6e3e60ccbcbd1881780f4ec

1 files changed, 39 insertions, 0 deletions

diff --git a/heuristic_ensemble_matcher.h b/heuristic_ensemble_matcher.h
new file mode 100644
index 0000000..1adb998
--- /dev/null
+++ b/heuristic_ensemble_matcher.h
@@ -0,0 +1,39 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_ZUCCHINI_HEURISTIC_ENSEMBLE_MATCHER_H_
+#define COMPONENTS_ZUCCHINI_HEURISTIC_ENSEMBLE_MATCHER_H_
+
+#include <ostream>
+
+#include "base/macros.h"
+#include "components/zucchini/buffer_view.h"
+#include "components/zucchini/ensemble_matcher.h"
+
+namespace zucchini {
+
+// An ensemble matcher that:
+// - Detects embedded elements in "old" and "new" archive files.
+// - Applies heuristics to create matched pairs.
+// It is desired to have matched pairs that:
+// - Have "reasonable" size difference (see UnsafeDifference() in the .cc file).
+// - Have "minimal distance" among other potential matched pairs.
+class HeuristicEnsembleMatcher : public EnsembleMatcher {
+ public:
+  explicit HeuristicEnsembleMatcher(std::ostream* out);
+  ~HeuristicEnsembleMatcher() override;
+
+  // EnsembleMatcher:
+  bool RunMatch(ConstBufferView old_image, ConstBufferView new_image) override;
+
+ private:
+  // Optional stream to print detailed information during matching.
+  std::ostream* out_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(HeuristicEnsembleMatcher);
+};
+
+}  // namespace zucchini
+
+#endif  // COMPONENTS_ZUCCHINI_HEURISTIC_ENSEMBLE_MATCHER_H_