[Findit & Predator] Code reorg of Findit.

appengine/findit_mock/README.md

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+# Findit
+
+[go/findit-site](https://sites.google.com/a/chromium.org/cr-culprit-finder/findit)
+
+Findit is a culprit finder for compile/test/flake failures on Chromium Waterfall
+and also flaky tests on Chromium Commit Queue. Now it supports:
+* Identify culprits for reliable test/compile failures on Waterfall
+* Distinguish flaky tests from reliable tests on Waterfall
+* Identify regression ranges for flaky gtests on both Waterfall and Commit Queue
+
+Findit has two separate entry points to run an analysis:
+* Waterfall failures: [go/findit-for-me](https://findit-for-me.appspot.com/)
+* Flaky tests: [go/findit-flake-checker](https://findit-for-me.appspot.com/waterfall/flake)
+
+Findit has two dashboards for the analysis results:
+* [Waterfall failures](https://findit-for-me.appspot.com/waterfall/list-analyses)
+* [Flaky tests](https://findit-for-me.appspot.com/waterfall/list-flakes)
+
+# Integration with other systems
+* Findit is integrated with [Sheriff-o-Matic](https://sheriff-o-matic.appspot.com) to analyze Waterfall failures, and surface analysis results to SoM for Chromium sheriffs. For detected flaky tests on Waterfall, further analysis is run automatically but asynchronously. Once a culprit is identified with high confidence, Findit also update the codereview of the culprit on [Rietveld](https://codereview.chromium.org/).
+
+* Findit is integrated with [Chromium Trybot Flakes](https://chromium-try-flakes.appspot.com/) to analyze flaky tests on Commit Queue, and update the corresponding Monorail bugs with any findings for the flakes.
+
+# Code structure
+
+* [libs](libs/README.md): shared, AppEngine-independent, but AppEngine-compatible APIs.
+* [gae\_libs](gae_libs/README.md): shared but AppEngine-dependent APIs.
+* [infra\_clients](infra_clients/README.md): AppEngine-dependent clients to
+  interact with various Chrome Infra services.
+* [analysis](analysis): Core of analysis for failures and flakes.
+* \*\_app: The App Engine modules to provide core services of Findit.
+* [scripts](scripts): Utility scripts to run locally on developer's workstation.
+* [third\_party](third_party): Third-party libraries that Findit depends on.
+
+# Contributions
+
+We welcome all contributions! Please refer to [DEV.md](DEV.md) for more info.