patch from chinmaygarde@ to make progress on mac, ios.

base/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 config("base_implementation") {
   defines = [ "BASE_IMPLEMENTATION" ]
+
+  if (is_ios) {
+    # base uses routines deprecated in iOS 8
+    cflags = [ "-Wno-deprecated-declarations" ]
+  }
 }
 
 if (is_win) {
   # This is in a separate config so the flags can be applied to dependents.
   # ldflags in GN aren't automatically inherited.
   config("base_win_linker_flags") {
     ldflags = [
       "/DELAYLOAD:cfgmgr32.dll",
       "/DELAYLOAD:powrprof.dll",
       "/DELAYLOAD:setupapi.dll",
@@ skipping 779 matching lines @@
     if (is_asan) {
       # TODO(GYP) hook up asan on Mac. GYP has this extra dylib:
       #data += [ "$root_out_dir/libclang_rt.asan_osx_dynamic.dylib" ]
     }
 
     if (is_ios) {
       sources -= [
         "files/file_path_watcher_fsevents.cc",
         "files/file_path_watcher_fsevents.h",
       ]
+
+      set_sources_assignment_filter([])
+      sources += [ "files/file_path_watcher_mac.cc" ]

[brettw, 2015/08/04 18:07:28]

This also appears in https://codereview.chromium.org/1257303005/
FIGHT!

[Dirk Pranke, 2015/08/04 18:27:15]

Yeah, I need to merge things.

+      set_sources_assignment_filter(sources_assignment_filter)
     }
   } else {
     # Non-Mac.
     sources -= [
       "files/file_path_watcher_fsevents.cc",
       "files/file_path_watcher_fsevents.h",
       "files/file_path_watcher_kqueue.cc",
       "files/file_path_watcher_kqueue.h",
     ]
   }
@@ skipping 489 matching lines @@
     "prefs/pref_value_map_unittest.cc",
     "prefs/pref_value_store_unittest.cc",
     "prefs/scoped_user_pref_update_unittest.cc",
     "process/memory_unittest.cc",
     "process/memory_unittest_mac.h",
     "process/memory_unittest_mac.mm",
     "process/process_metrics_unittest.cc",
     "process/process_metrics_unittest_ios.cc",
     "process/process_unittest.cc",
     "process/process_util_unittest.cc",
-    "process/process_util_unittest_ios.cc",
     "profiler/stack_sampling_profiler_unittest.cc",
     "profiler/tracked_time_unittest.cc",
     "rand_util_unittest.cc",
     "scoped_clear_errno_unittest.cc",
     "scoped_generic_unittest.cc",
     "scoped_native_library_unittest.cc",
     "security_unittest.cc",
     "sequence_checker_unittest.cc",
     "sha1_unittest.cc",
     "stl_util_unittest.cc",
@@ skipping 119 matching lines @@
     ]
 
     # Pull in specific Mac files for iOS (which have been filtered out by file
     # name rules).
     set_sources_assignment_filter([])
     sources += [
       "mac/bind_objc_block_unittest.mm",
       "mac/foundation_util_unittest.mm",
       "mac/objc_property_releaser_unittest.mm",
       "mac/scoped_nsobject_unittest.mm",
-      "sys_string_conversions_mac_unittest.mm",
+      "strings/sys_string_conversions_mac_unittest.mm",
     ]
     set_sources_assignment_filter(sources_assignment_filter)
 
     # TODO(GYP): dep on copy_test_data_ios action.
   }
 
   if (is_linux) {
     sources -= [ "file_version_info_unittest.cc" ]
     sources += [ "nix/xdg_util_unittest.cc" ]
     deps += [ "//base/test:malloc_wrapper" ]
@@ skipping 152 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }