[tracing] Don't use dot-based path expansion in TracedValue

base/trace_event/trace_event_argument_unittest.cc

 // Copyright (c) 2014 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/trace_event/trace_event_argument.h"
 #include "base/values.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 namespace trace_event {
 
 TEST(TraceEventArgumentTest, FlatDictionary) {
   scoped_refptr<TracedValue> value = new TracedValue();
   value->SetInteger("int", 2014);
   value->SetDouble("double", 0.0);
   value->SetBoolean("bool", true);
   value->SetString("string", "string");
   std::string json = "PREFIX";
   value->AppendAsTraceFormat(&json);
   EXPECT_EQ(
       "PREFIX{\"bool\":true,\"double\":0.0,\"int\":2014,\"string\":\"string\"}",
       json);
 }
 
+TEST(TraceEventArgumentTest, NoDotPathExpansion) {
+  scoped_refptr<TracedValue> value = new TracedValue();
+  value->SetInteger("in.t", 2014);
+  value->SetDouble("doub.le", 0.0);
+  value->SetBoolean("bo.ol", true);
+  value->SetString("str.ing", "str.ing");
+  std::string json;
+  value->AppendAsTraceFormat(&json);
+  EXPECT_EQ(
+      "{\"bo.ol\":true,\"doub.le\":0.0,\"in.t\":2014,\"str.ing\":\"str.ing\"}",
+      json);
+}
+
 TEST(TraceEventArgumentTest, Hierarchy) {
   scoped_refptr<TracedValue> value = new TracedValue();
   value->SetInteger("i0", 2014);
   value->BeginDictionary("dict1");
   value->SetInteger("i1", 2014);
   value->BeginDictionary("dict2");
   value->SetBoolean("b2", false);
   value->EndDictionary();
   value->SetString("s1", "foo");
   value->EndDictionary();
@@ skipping 102 matching lines @@
   nested_dict_value->SetInteger("f", 3);
   nested_dict_value->BeginDictionary("g");
   nested_dict_value->EndDictionary();
   json = "";
   nested_dict_value->AppendAsTraceFormat(&json);
   EXPECT_EQ("{\"b\":2,\"c\":[\"foo\"],\"f\":3,\"g\":{}}", json);
 }
 
 }  // namespace trace_event
 }  // namespace base