Added proto for ChromeTraceEvents, and a config string to the DataSourceConfig for Chrome tracing as well

Change-Id: Ida4b690887769319323de722114aef9297653a72

tools/gen_tracing_cpp_headers_from_protos.py

diff --git a/tools/gen_tracing_cpp_headers_from_protos.py b/tools/gen_tracing_cpp_headers_from_protos.py
index c12057f..fc250ac 100755
--- a/tools/gen_tracing_cpp_headers_from_protos.py
+++ b/tools/gen_tracing_cpp_headers_from_protos.py
@@ -18,6 +18,7 @@
 import sys
 
 PROTOS = (
+  'perfetto/config/chrome/chrome_config.proto',
   'perfetto/config/data_source_config.proto',
   'perfetto/config/data_source_descriptor.proto',
   'perfetto/config/ftrace/ftrace_config.proto',