Tracing v2: wire up stubs generated by the protozero protoc plugin

components/tracing/core/trace_buffer_writer_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/tracing/core/trace_buffer_writer.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "components/tracing/core/trace_ring_buffer.h"
+#include "components/tracing/proto/event.pbzero.h"
 #include "components/tracing/test/golden_protos/events_chunk.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace tracing {
 namespace v2 {
 namespace {
 
-class MockEvent : public ::tracing::proto::Event {
+class MockEvent : public pbzero::tracing::proto::Event {
  public:
   static TraceEventHandle Add(TraceBufferWriter* writer, size_t event_size) {
     TraceEventHandle handle = writer->AddEvent();
     MockEvent* mock_event = static_cast<MockEvent*>(&*handle);
 
     size_t buffer_size = 0;
     DCHECK_GT(event_size, 2u);
     if (event_size < (1 << 7) + 2)
       buffer_size = event_size - 2;
     else if (event_size < (1 << 14) + 3)
@@ skipping 274 matching lines @@
   // writer[3] did the last write before the bankrupcy and has one extra event.
   ReadBackAndTestChunk(8, writer[3]->writer_id(), 1, 3, true, true);
 
   // writer[4] overflew in the bankrupcy chunk and has 3 events as well.
   ReadBackAndTestChunk(9, writer[4]->writer_id(), 1, 3, true, true);
 }
 
 }  // namespace
 }  // namespace v2
 }  // namespace tracing