Get mojo_shell building inside chromium checkout.

mojo/common/trace_controller_impl.cc

+// Copyright 2015 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 "mojo/common/trace_controller_impl.h"
+
+#include "base/trace_event/trace_event.h"
+#include "third_party/mojo/src/mojo/public/cpp/application/application_connection.h"
+#include "third_party/mojo/src/mojo/public/cpp/application/application_impl.h"
+
+namespace mojo {
+
+TraceControllerImpl::TraceControllerImpl(
+    InterfaceRequest<tracing::TraceController> request)
+    : binding_(this, request.Pass()) {
+}
+
+TraceControllerImpl::~TraceControllerImpl() {
+}
+
+void TraceControllerImpl::StartTracing(
+    const String& categories,
+    tracing::TraceDataCollectorPtr collector) {
+  DCHECK(!collector_.get());
+  collector_ = collector.Pass();
+  std::string categories_str = categories.To<std::string>();
+  base::trace_event::TraceLog::GetInstance()->SetEnabled(
+      base::trace_event::CategoryFilter(categories_str),
+      base::trace_event::TraceLog::RECORDING_MODE,
+      base::trace_event::TraceOptions(base::trace_event::RECORD_UNTIL_FULL));
+}
+
+void TraceControllerImpl::StopTracing() {
+  base::trace_event::TraceLog::GetInstance()->SetDisabled();
+
+  base::trace_event::TraceLog::GetInstance()->Flush(
+      base::Bind(&TraceControllerImpl::SendChunk, base::Unretained(this)));
+}
+
+void TraceControllerImpl::SendChunk(
+    const scoped_refptr<base::RefCountedString>& events_str,
+    bool has_more_events) {
+  collector_->DataCollected(mojo::String(events_str->data()));
+  if (!has_more_events) {
+    collector_.reset();
+  }
+}
+
+}  // namespace mojo