Revert of Add support for backgrounding processes on the Mac

base/process/process_unittest.cc

Index: base/process/process_unittest.cc
diff --git a/base/process/process_unittest.cc b/base/process/process_unittest.cc
index e094c032f3bb07e4e7530ac3276e2e77726629e0..ba8e4e6f68820c0827a463c63d0022e588a689bb 100644
--- a/base/process/process_unittest.cc
+++ b/base/process/process_unittest.cc
@@ -10,10 +10,6 @@
 #include "base/threading/platform_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/multiprocess_func_list.h"
-
-#if defined(OS_MACOSX)
-#include <mach/mach.h>
-#endif  // OS_MACOSX
 
 namespace {
 
@@ -174,19 +170,7 @@
 TEST_F(ProcessTest, SetProcessBackgrounded) {
   Process process(SpawnChild("SimpleChildProcess"));
   int old_priority = process.GetPriority();
-#if defined(OS_MACOSX)
-  // On the Mac, backgrounding a process requires a port to that process.
-  // In the browser it's available through the MachBroker class, which is not
-  // part of base. Additionally, there is an indefinite amount of time between
-  // spawning a process and receiving its port. Because this test just checks
-  // the ability to background/foreground a process, we can use the current
-  // process's port instead.
-  mach_port_t process_port = mach_task_self();
-  EXPECT_TRUE(process.SetProcessBackgrounded(process_port, true));
-  EXPECT_TRUE(process.IsProcessBackgrounded(process_port));
-  EXPECT_TRUE(process.SetProcessBackgrounded(process_port, false));
-  EXPECT_FALSE(process.IsProcessBackgrounded(process_port));
-#elif defined(OS_WIN)
+#if defined(OS_WIN)
   EXPECT_TRUE(process.SetProcessBackgrounded(true));
   EXPECT_TRUE(process.IsProcessBackgrounded());
   EXPECT_TRUE(process.SetProcessBackgrounded(false));
@@ -204,13 +188,7 @@
 TEST_F(ProcessTest, SetProcessBackgroundedSelf) {
   Process process = Process::Current();
   int old_priority = process.GetPriority();
-#if defined(OS_MACOSX)
-  mach_port_t process_port = mach_task_self();
-  EXPECT_TRUE(process.SetProcessBackgrounded(process_port, true));
-  EXPECT_TRUE(process.IsProcessBackgrounded(process_port));
-  EXPECT_TRUE(process.SetProcessBackgrounded(process_port, false));
-  EXPECT_FALSE(process.IsProcessBackgrounded(process_port));
-#elif defined(OS_WIN)
+#if defined(OS_WIN)
   EXPECT_TRUE(process.SetProcessBackgrounded(true));
   EXPECT_TRUE(process.IsProcessBackgrounded());
   EXPECT_TRUE(process.SetProcessBackgrounded(false));