Define a protobuf format for representing plots

webrtc/tools/tools.gyp

Index: webrtc/tools/tools.gyp
diff --git a/webrtc/tools/tools.gyp b/webrtc/tools/tools.gyp
index 34da51987b5c5e81873a1eed370f13e9c83843f1..984a66d28a6d3e598ea8ac463a35abc28c3dc4ad 100644
--- a/webrtc/tools/tools.gyp
+++ b/webrtc/tools/tools.gyp
@@ -105,7 +105,20 @@
       # There should be a cleaner way to do this. The tool is not test related.
       'targets': [
         {
-          # This target should only be built if enable_protobuf is set
+          # This target should only be built if enable_protobuf is set.
+          'target_name': 'graph_proto',
+          'type': 'static_library',
+          'sources': [
+            'event_log_visualizer/graph.proto',
+          ],
+          'variables': {
+            'proto_in_dir': 'event_log_visualizer',
+            'proto_out_dir': 'webrtc/tools/event_log_visualizer',
+          },
+          'includes': ['../build/protoc.gypi'],
+        },
+        {
+          # This target should only be built if enable_protobuf is set.
           'target_name': 'event_log_visualizer',
           'type': 'executable',
           'dependencies': [
@@ -115,6 +128,7 @@
             '<(webrtc_root)/modules/modules.gyp:rtp_rtcp',
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:metrics_default',
             '<(webrtc_root)/test/test.gyp:field_trial',
+            '<(webrtc_root)/tools/tools.gyp:graph_proto',
             '<(DEPTH)/third_party/gflags/gflags.gyp:gflags',
           ],
           'sources': [
@@ -125,6 +139,8 @@
             'event_log_visualizer/plot_base.h',
             'event_log_visualizer/plot_python.cc',
             'event_log_visualizer/plot_python.h',
+            'event_log_visualizer/plot_protobuf.cc',
+            'event_log_visualizer/plot_protobuf.h',
           ],
         },
       ],