Remove use of base/synchronization in scheduler 1:1 replacment with std classes. Change-Id: Ie753a49f84da32a8d440dd307a6f871d6fee2985 Reviewed-on: https://gn-review.googlesource.com/1700 Reviewed-by: Brett Wilson <brettw@chromium.org> Commit-Queue: Scott Graham <scottmg@chromium.org>

diff --git a/tools/gn/scheduler.cc b/tools/gn/scheduler.cc
index 8da3035..00b5c61 100644
--- a/tools/gn/scheduler.cc
+++ b/tools/gn/scheduler.cc

@@ -18,7 +18,8 @@
     : main_thread_run_loop_(MsgLoop::Current()),
       input_file_manager_(new InputFileManager),
       verbose_logging_(false),
-      pool_work_count_cv_(&pool_work_count_lock_),
+      pool_work_count_lock_(),
+      pool_work_count_cv_(),
       worker_pool_(),
       is_failed_(false),
       suppress_output_for_testing_(false),
@@ -72,8 +73,8 @@
         std::move(work).Run();
         self->DecrementWorkCount();
         if (!self->pool_work_count_.Decrement()) {
-          base::AutoLock auto_lock(self->pool_work_count_lock_);
-          self->pool_work_count_cv_.Signal();
+          std::unique_lock<std::mutex> auto_lock(self->pool_work_count_lock_);
+          self->pool_work_count_cv_.notify_one();
         }
       },
       this, std::move(work)));
@@ -179,7 +180,7 @@
 }
 
 void Scheduler::WaitForPoolTasks() {
-  base::AutoLock lock(pool_work_count_lock_);
+  std::unique_lock<std::mutex> lock(pool_work_count_lock_);
   while (!pool_work_count_.IsZero())
-    pool_work_count_cv_.Wait();
+    pool_work_count_cv_.wait(lock);
 }

diff --git a/tools/gn/scheduler.h b/tools/gn/scheduler.h
index a7af3d4..1677b4d 100644
--- a/tools/gn/scheduler.h
+++ b/tools/gn/scheduler.h

@@ -5,13 +5,13 @@
 #ifndef TOOLS_GN_SCHEDULER_H_
 #define TOOLS_GN_SCHEDULER_H_
 
+#include <condition_variable>
 #include <map>
+#include <mutex>
 
 #include "base/atomic_ref_count.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
-#include "base/synchronization/condition_variable.h"
-#include "base/synchronization/lock.h"
 #include "msg_loop.h"
 #include "task.h"
 #include "tools/gn/input_file_manager.h"
@@ -118,10 +118,10 @@
   base::AtomicRefCount pool_work_count_;
 
   // Lock for |pool_work_count_cv_|.
-  base::Lock pool_work_count_lock_;
+  std::mutex pool_work_count_lock_;
 
   // Condition variable signaled when |pool_work_count_| reaches zero.
-  base::ConditionVariable pool_work_count_cv_;
+  std::condition_variable pool_work_count_cv_;
 
   WorkerPool worker_pool_;