[libfuzzer] documentation update

BUG=539572

Review URL: https://codereview.chromium.org/1837913004

Cr-Commit-Position: refs/heads/master@{#384111}
diff --git a/testing/libfuzzer/README.md b/testing/libfuzzer/README.md
index b53e196..3d06f1e 100644
--- a/testing/libfuzzer/README.md
+++ b/testing/libfuzzer/README.md
@@ -1,4 +1,4 @@
-# Libfuzzer in Chrome
+# libFuzzer in Chrome
 
 [go/libfuzzer-chrome](https://goto.google.com/libfuzzer-chrome)
 
@@ -6,14 +6,15 @@
 [Getting Started](getting_started.md)
 | [Buildbot](https://goto.google.com/libfuzzer-clusterfuzz-buildbot)
 | [ClusterFuzz Status](https://goto.google.com/libfuzzer-clusterfuzz-status)
+| [Cover Bug]
 ***
 
-This directory contains integration between [LibFuzzer] and Chrome.
-Libfuzzer is an in-process coverage-driven evolutionary fuzzer. It helps
+This directory contains integration between [libFuzzer] and Chrome.
+libFuzzer is an in-process coverage-driven evolutionary fuzzer. It helps
 engineers to uncover potential security & stability problems earlier.
 
 *** note
-**Requirements:** libfuzzer in chrome is supported with GN on Linux only. 
+**Requirements:** libFuzzer in chrome is supported with GN on Linux only. 
 ***
 
 ## Integration Status
@@ -28,13 +29,24 @@
 * [Efficient Fuzzer Guide] explains how to measure fuzzer effectiveness and
 ways to improve it.
 * [ClusterFuzz Integration] describes integration between ClusterFuzz and 
-libfuzzer.
+libFuzzer.
 * [Reference] contains detailed references for different integration parts.
 
 
-[LibFuzzer]: http://llvm.org/docs/LibFuzzer.html
+## Trophies
+* [ClusterFuzz Bugs] - issues found and automatically filed by ClusterFuzz.
+* [Manual Bugs] - issues that were filed manually after running fuzzers.
+* [Pdfium Bugs] - bugs found in pdfium by manual fuzzing.
+* [OSS Trophies] - bugs found with libFuzzer in open-source projects.
+
+[libFuzzer]: http://llvm.org/docs/LibFuzzer.html
 [crbug.com/539572]: https://bugs.chromium.org/p/chromium/issues/detail?id=539572
+[Cover Bug]: https://bugs.chromium.org/p/chromium/issues/detail?id=539572
 [Getting Started Guide]: getting_started.md
 [Efficient Fuzzer Guide]: efficient_fuzzer.md
 [ClusterFuzz Integration]: clusterfuzz.md
 [Reference]: reference.md
+[ClusterFuzz Bugs]: https://bugs.chromium.org/p/chromium/issues/list?can=1&q=label:Stability-LibFuzzer%20label:ClusterFuzz&sort=-modified&colspec=ID%20Pri%20M%20Stars%20ReleaseBlock%20Component%20Status%20Owner%20Summary%20OS%20Modified
+[Pdfium Bugs]: https://bugs.chromium.org/p/pdfium/issues/list?can=1&q=libfuzzer&colspec=ID+Type+Status+Priority+Milestone+Owner+Summary&cells=tiles
+[Manual Bugs]: https://bugs.chromium.org/p/chromium/issues/list?can=1&q=label%3AStability-LibFuzzer+-label%3AClusterFuzz&sort=-modified&colspec=ID+Pri+M+Stars+ReleaseBlock+Component+Status+Owner+Summary+OS+Modified&x=m&y=releaseblock&cells=ids
+[OSS Trophies]: http://llvm.org/docs/LibFuzzer.html#trophies