[tracing] Move GN/gyp build files under trace_event

Move all trace_event related build files in their own
gyp / gn target under base/trace_event.
This should allow easier maintenance of tracing code.

BUG=

Review URL: https://codereview.chromium.org/1014923002

Cr-Commit-Position: refs/heads/master@{#321430}

base/BUILD.gn

@@ -1251,16 +1251,6 @@ test("base_unittests") {
     "timer/mock_timer_unittest.cc",
     "timer/timer_unittest.cc",
     "tools_sanity_unittest.cc",
-    "trace_event/memory_allocator_dump_unittest.cc",
-    "trace_event/memory_dump_manager_unittest.cc",
-    "trace_event/process_memory_maps_dump_provider_unittest.cc",
-    "trace_event/process_memory_totals_dump_provider_unittest.cc",
-    "trace_event/trace_event_argument_unittest.cc",
-    "trace_event/trace_event_memory_unittest.cc",
-    "trace_event/trace_event_synthetic_delay_unittest.cc",
-    "trace_event/trace_event_system_stats_monitor_unittest.cc",
-    "trace_event/trace_event_unittest.cc",
-    "trace_event/trace_event_win_unittest.cc",
     "tracked_objects_unittest.cc",
     "tuple_unittest.cc",
     "values_unittest.cc",
@@ -1298,6 +1288,7 @@ test("base_unittests") {
     "//base/test:test_support",
     "//base/third_party/dynamic_annotations",
     "//base/third_party/nspr",
+    "//base/trace_event:trace_event_unittests",
     "//testing/gmock",
     "//testing/gtest",
     "//third_party/icu",

base/base.gyp

@@ -656,16 +656,6 @@
         'timer/mock_timer_unittest.cc',
         'timer/timer_unittest.cc',
         'tools_sanity_unittest.cc',
-        'trace_event/memory_allocator_dump_unittest.cc',
-        'trace_event/memory_dump_manager_unittest.cc',
-        'trace_event/process_memory_maps_dump_provider_unittest.cc',
-        'trace_event/process_memory_totals_dump_provider_unittest.cc',
-        'trace_event/trace_event_argument_unittest.cc',
-        'trace_event/trace_event_memory_unittest.cc',
-        'trace_event/trace_event_synthetic_delay_unittest.cc',
-        'trace_event/trace_event_system_stats_monitor_unittest.cc',
-        'trace_event/trace_event_unittest.cc',
-        'trace_event/trace_event_win_unittest.cc',
         'tracked_objects_unittest.cc',
         'tuple_unittest.cc',
         'values_unittest.cc',
@@ -690,6 +680,7 @@
         'win/startup_information_unittest.cc',
         'win/win_util_unittest.cc',
         'win/wrapped_window_proc_unittest.cc',
+        '<@(trace_event_test_sources)',
       ],
       'dependencies': [
         'base',

base/base.gypi

@@ -3,6 +3,9 @@
 # found in the LICENSE file.
 
 {
+  'includes': [
+    'trace_event/trace_event.gypi',
+  ],
   'target_defaults': {
     'variables': {
       'base_target': 0,
@@ -660,38 +663,6 @@
           'timer/mock_timer.h',
           'timer/timer.cc',
           'timer/timer.h',
-          'trace_event/memory_allocator_attributes.h',
-          'trace_event/memory_allocator_dump.cc',
-          'trace_event/memory_allocator_dump.h',
-          'trace_event/memory_dump_manager.cc',
-          'trace_event/memory_dump_manager.h',
-          'trace_event/memory_dump_provider.cc',
-          'trace_event/memory_dump_provider.h',
-          'trace_event/process_memory_dump.cc',
-          'trace_event/process_memory_dump.h',
-          'trace_event/process_memory_maps.cc',
-          'trace_event/process_memory_maps.h',
-          'trace_event/process_memory_maps_dump_provider.cc',
-          'trace_event/process_memory_maps_dump_provider.h',
-          'trace_event/process_memory_totals.cc',
-          'trace_event/process_memory_totals.h',
-          'trace_event/process_memory_totals_dump_provider.cc',
-          'trace_event/process_memory_totals_dump_provider.h',
-          'trace_event/trace_event.h',
-          'trace_event/trace_event_android.cc',
-          'trace_event/trace_event_argument.cc',
-          'trace_event/trace_event_argument.h',
-          'trace_event/trace_event_impl.cc',
-          'trace_event/trace_event_impl.h',
-          'trace_event/trace_event_impl_constants.cc',
-          'trace_event/trace_event_memory.cc',
-          'trace_event/trace_event_memory.h',
-          'trace_event/trace_event_synthetic_delay.cc',
-          'trace_event/trace_event_synthetic_delay.h',
-          'trace_event/trace_event_system_stats_monitor.cc',
-          'trace_event/trace_event_system_stats_monitor.h',
-          'trace_event/trace_event_win.cc',
-          'trace_event/trace_event_win.h',
           'tracked_objects.cc',
           'tracked_objects.h',
           'tracking_info.cc',
@@ -754,6 +725,7 @@
           'win/windows_version.h',
           'win/wrapped_window_proc.cc',
           'win/wrapped_window_proc.h',
+          '<@(trace_event_sources)',
         ],
         'defines': [
           'BASE_IMPLEMENTATION',

base/trace_event/BUILD.gn

-# Copyright (c) 2015 The Chromium Authors. All rights reserved.
+# 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.
 
@@ -63,3 +63,25 @@ source_set("trace_event") {
 
   visibility = [ "//base/*" ]
 }
+
+source_set("trace_event_unittests") {
+  testonly = true
+  sources = [
+    "memory_allocator_dump_unittest.cc",
+    "memory_dump_manager_unittest.cc",
+    "process_memory_maps_dump_provider_unittest.cc",
+    "process_memory_totals_dump_provider_unittest.cc",
+    "trace_event_argument_unittest.cc",
+    "trace_event_memory_unittest.cc",
+    "trace_event_synthetic_delay_unittest.cc",
+    "trace_event_system_stats_monitor_unittest.cc",
+    "trace_event_unittest.cc",
+    "trace_event_win_unittest.cc",
+  ]
+
+  deps = [
+    "//base/test:test_support",
+    "//testing/gmock",
+    "//testing/gtest",
+  ]
+}

base/trace_event/trace_event.gypi

+# 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.
+{
+  'variables': {
+    'trace_event_sources' : [
+      'trace_event/memory_allocator_attributes.h',
+      'trace_event/memory_allocator_dump.cc',
+      'trace_event/memory_allocator_dump.h',
+      'trace_event/memory_dump_manager.cc',
+      'trace_event/memory_dump_manager.h',
+      'trace_event/memory_dump_provider.cc',
+      'trace_event/memory_dump_provider.h',
+      'trace_event/process_memory_dump.cc',
+      'trace_event/process_memory_dump.h',
+      'trace_event/process_memory_maps.cc',
+      'trace_event/process_memory_maps.h',
+      'trace_event/process_memory_maps_dump_provider.cc',
+      'trace_event/process_memory_maps_dump_provider.h',
+      'trace_event/process_memory_totals.cc',
+      'trace_event/process_memory_totals.h',
+      'trace_event/process_memory_totals_dump_provider.cc',
+      'trace_event/process_memory_totals_dump_provider.h',
+      'trace_event/trace_event.h',
+      'trace_event/trace_event_android.cc',
+      'trace_event/trace_event_argument.cc',
+      'trace_event/trace_event_argument.h',
+      'trace_event/trace_event_impl.cc',
+      'trace_event/trace_event_impl.h',
+      'trace_event/trace_event_impl_constants.cc',
+      'trace_event/trace_event_memory.cc',
+      'trace_event/trace_event_memory.h',
+      'trace_event/trace_event_synthetic_delay.cc',
+      'trace_event/trace_event_synthetic_delay.h',
+      'trace_event/trace_event_system_stats_monitor.cc',
+      'trace_event/trace_event_system_stats_monitor.h',
+      'trace_event/trace_event_win.cc',
+      'trace_event/trace_event_win.h',
+    ],
+    'trace_event_test_sources' : [
+      'trace_event/memory_allocator_dump_unittest.cc',
+      'trace_event/memory_dump_manager_unittest.cc',
+      'trace_event/process_memory_maps_dump_provider_unittest.cc',
+      'trace_event/process_memory_totals_dump_provider_unittest.cc',
+      'trace_event/trace_event_argument_unittest.cc',
+      'trace_event/trace_event_memory_unittest.cc',
+      'trace_event/trace_event_synthetic_delay_unittest.cc',
+      'trace_event/trace_event_system_stats_monitor_unittest.cc',
+      'trace_event/trace_event_unittest.cc',
+      'trace_event/trace_event_win_unittest.cc',
+    ],
+  },
+}