Update DevTools Tracing.Start to accept trace config as a parameter

content/browser/devtools/protocol/tracing_handler_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 "base/json/json_reader.h"
+#include "base/trace_event/trace_config.h"
+#include "base/values.h"
+#include "content/browser/devtools/protocol/tracing_handler.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace devtools {
+namespace tracing {
+
+namespace {
+
+const char kCustomTraceConfigString[] =
+  "{"
+    "\"enable_argument_filter\":true,"
+    "\"enable_sampling\":true,"
+    "\"enable_systrace\":true,"
+    "\"excluded_categories\":[\"excluded\",\"exc_pattern*\"],"
+    "\"included_categories\":[\"included\","
+                            "\"inc_pattern*\","
+                            "\"disabled-by-default-cc\","
+                            "\"disabled-by-default-memory-infra\"],"
+    "\"memory_dump_config\":{"
+      "\"triggers\":["
+        "{\"mode\":\"light\",\"periodic_interval_ms\":50},"
+        "{\"mode\":\"detailed\",\"periodic_interval_ms\":1000}"
+      "]"
+    "},"
+    "\"record_mode\":\"record-continuously\","
+    "\"synthetic_delays\":[\"test.Delay1;16\",\"test.Delay2;32\"]"
+  "}";
+
+const char kCustomTraceConfigStringDevtoolsStyle[] =
+  "{"
+    "\"enableArgumentFilter\":true,"
+    "\"enableSampling\":true,"
+    "\"enableSystrace\":true,"
+    "\"excludedCategories\":[\"excluded\",\"exc_pattern*\"],"
+    "\"includedCategories\":[\"included\","
+                            "\"inc_pattern*\","
+                            "\"disabled-by-default-cc\","
+                            "\"disabled-by-default-memory-infra\"],"
+    "\"memoryDumpConfig\":{"
+      "\"triggers\":["
+        "{\"mode\":\"light\",\"periodicIntervalMs\":50},"
+        "{\"mode\":\"detailed\",\"periodicIntervalMs\":1000}"
+      "]"
+    "},"
+    "\"recordMode\":\"recordContinuously\","
+    "\"synthetic_delays\":[\"test.Delay1;16\",\"test.Delay2;32\"]"
+  "}";
+
+}
+
+TEST(TracingHandlerTest, GetTraceConfigFromDevtoolsConfig) {
+  scoped_ptr<base::Value> value = base::JSONReader::Read(
+      kCustomTraceConfigStringDevtoolsStyle);
+  scoped_ptr<base::DictionaryValue> devtools_style_dict(
+      static_cast<base::DictionaryValue*>(value.release()));
+
+  base::trace_event::TraceConfig trace_config =
+      TracingHandler::GetTraceConfigFromDevtoolsConfig(*devtools_style_dict);
+
+  EXPECT_STREQ(kCustomTraceConfigString, trace_config.ToString().c_str());
+}
+
+}  // namespace tracing
+}  // namespace devtools
+}  // namespace content