EDK: Move mutex.*, cond_var.*, and thread_annotations.h to //mojo/edk/util.

mojo/edk/util/thread_annotations_unittest.cc

 // 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.
 
 // Tests of the static thread annotation macros. These fall into two categories,
 // positive tests (testing that correct code compiles and works) and negative
 // tests (testing that incorrect code does not compile).
 //
 // Unfortunately, we don't have systematic/automated negative compilation tests.
 // So instead we have some cheesy macros that you can define to enable
 // individual compilation failures.
 
-#include "mojo/edk/system/thread_annotations.h"
+#include "mojo/edk/util/thread_annotations.h"
 
-#include "mojo/edk/system/mutex.h"
+#include "mojo/edk/util/mutex.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // Uncomment these to enable particular compilation failure tests.
 // #define NC_GUARDED_BY
 // TODO(vtl): |ACQUIRED_{BEFORE,AFTER}()| are currently unimplemented in clang
 // as of 2015-07-06 ("To be fixed in a future update."). So this actually
 // compiles!
 // #define NC_ACQUIRED_BEFORE
 
 namespace mojo {
-namespace system {
+namespace util {
 namespace {
 
 // Test MOJO_GUARDED_BY --------------------------------------------------------
 
 class GuardedByClass {
  public:
   GuardedByClass() : x_() {}
   ~GuardedByClass() {}
 
   void GoodSet(int x) {
@@ skipping 75 matching lines @@
   AcquiredBeforeClass2 c2;
   c2.GoodMethod(&c1);
 #ifdef NC_ACQUIRED_BEFORE
   c1.BadMethod(&c2);
 #endif
 }
 
 // TODO(vtl): Test more things.
 
 }  // namespace
-}  // namespace system
+}  // namespace util
 }  // namespace mojo