Cleanup: removing unused descendants information from tracked objects

chrome/browser/task_profiler/task_profiler_data_serializer_unittest.cc

 // Copyright (c) 2012 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 <string>
 
 #include "base/basictypes.h"
 #include "base/json/json_writer.h"
 #include "base/process/process_handle.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 23 matching lines @@
 }  // anonymous namespace
 
 // Tests the JSON serialization format for profiled process data.
 TEST(TaskProfilerDataSerializerTest, SerializeProcessDataToJson) {
   {
     // Empty data.
     tracked_objects::ProcessDataPhaseSnapshot process_data_phase;
     int process_type = content::PROCESS_TYPE_BROWSER;
     ExpectSerialization(process_data_phase, 239, process_type,
                         "{"
-                        "\"descendants\":["
-                        "],"
                         "\"list\":["
                         "],"
                         "\"process_id\":239,"
                         "\"process_type\":\"Browser\""
                         "}");
   }
 
   {
     // Non-empty data.
     tracked_objects::ProcessDataPhaseSnapshot process_data_phase;
@@ skipping 29 matching lines @@
     process_data_phase.tasks.back().birth = child;
     process_data_phase.tasks.back().death_data.count = 41;
     process_data_phase.tasks.back().death_data.run_duration_max = 205;
     process_data_phase.tasks.back().death_data.run_duration_sample = 203;
     process_data_phase.tasks.back().death_data.run_duration_sum = 2017;
     process_data_phase.tasks.back().death_data.queue_duration_max = 2053;
     process_data_phase.tasks.back().death_data.queue_duration_sample = 2013;
     process_data_phase.tasks.back().death_data.queue_duration_sum = 2079;
     process_data_phase.tasks.back().death_thread_name = "PAC thread #3";
 
-    // Add a parent-child pair.
-    process_data_phase.descendants.push_back(
-        tracked_objects::ParentChildPairSnapshot());
-    process_data_phase.descendants.back().parent = parent;
-    process_data_phase.descendants.back().child = child;
-
     int process_type = content::PROCESS_TYPE_RENDERER;
     ExpectSerialization(process_data_phase, 239, process_type,
                         "{"
-                        "\"descendants\":["
-                        "{"
-                        "\"child_location\":{"
-                        "\"file_name\":\"path/to/bar.cc\","
-                        "\"function_name\":\"FizzBoom\","
-                        "\"line_number\":433"
-                        "},"
-                        "\"child_thread\":\"Chrome_IOThread\","
-                        "\"parent_location\":{"
-                        "\"file_name\":\"path/to/foo.cc\","
-                        "\"function_name\":\"WhizBang\","
-                        "\"line_number\":101"
-                        "},"
-                        "\"parent_thread\":\"CrBrowserMain\""
-                        "}"
-                        "],"
                         "\"list\":[{"
                         "\"birth_location\":{"
                         "\"file_name\":\"path/to/foo.cc\","
                         "\"function_name\":\"WhizBang\","
                         "\"line_number\":101"
                         "},"
                         "\"birth_thread\":\"CrBrowserMain\","
                         "\"death_data\":{"
                         "\"count\":37,"
                         "\"queue_ms\":79,"
@@ skipping 20 matching lines @@
                         "\"run_ms_max\":205,"
                         "\"run_ms_sample\":203"
                         "},"
                         "\"death_thread\":\"PAC thread #3\""
                         "}],"
                         "\"process_id\":239,"
                         "\"process_type\":\"Tab\""
                         "}");
   }
 }