Tracing V2: Import support for protobuf plugin.

components/tracing/test/example_proto/library_internals/galaxies.proto

Index: components/tracing/test/example_proto/library_internals/galaxies.proto
diff --git a/tools/clang/rewrite_to_chrome_style/tests/gen/thing.h b/components/tracing/test/example_proto/library_internals/galaxies.proto
similarity index 62%
copy from tools/clang/rewrite_to_chrome_style/tests/gen/thing.h
copy to components/tracing/test/example_proto/library_internals/galaxies.proto
index 900b65c4cc4d0a285729491e4d03ed6f3a52b0f3..21e9019615222a3fc2234ec160fb69770c40a6f1 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/gen/thing.h
+++ b/components/tracing/test/example_proto/library_internals/galaxies.proto
@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-namespace blink {
-void genThing();
+syntax = "proto2";
+package foo.bar;
 
-class GenClass {
-  virtual void genMethod() {}
-};
+enum Galaxy {
+  MILKY_WAY = 1;
+  ANDROMEDA = 2;
+  SUNFLOWER = 3;
 }