ui: Cleanup class/struct forward declarations

base/process/process_posix.cc

Index: base/process/process_posix.cc
diff --git a/base/process/process_posix.cc b/base/process/process_posix.cc
index a9d745eeead1cfa6c426b4e974cbf2ede034a159..20fab9214163075fd0b0e39fbf64832a3463881f 100644
--- a/base/process/process_posix.cc
+++ b/base/process/process_posix.cc
@@ -257,12 +257,12 @@ Process Process::DeprecatedGetProcessFromHandle(ProcessHandle handle) {
   return Process(handle);
 }
 
-#if !defined(OS_LINUX)
+#if !defined(OS_LINUX) && !defined(OS_MACOSX)
 // static
 bool Process::CanBackgroundProcesses() {
   return false;
 }
-#endif  // !defined(OS_LINUX)
+#endif  // !defined(OS_LINUX) && !defined(OS_MACOSX)
 
 bool Process::IsValid() const {
   return process_ != kNullProcessHandle;
@@ -361,7 +361,7 @@ bool Process::WaitForExitWithTimeout(TimeDelta timeout, int* exit_code) {
   return WaitForExitWithTimeoutImpl(Handle(), exit_code, timeout);
 }
 
-#if !defined(OS_LINUX)
+#if !defined(OS_LINUX) && !defined(OS_MACOSX)
 bool Process::IsProcessBackgrounded() const {
   // See SetProcessBackgrounded().
   DCHECK(IsValid());
@@ -369,13 +369,13 @@ bool Process::IsProcessBackgrounded() const {
 }
 
 bool Process::SetProcessBackgrounded(bool value) {
-  // Not implemented for POSIX systems other than Linux. With POSIX, if we were
-  // to lower the process priority we wouldn't be able to raise it back to its
-  // initial priority.
+  // Not implemented for POSIX systems other than Linux and Mac. With POSIX, if
+  // we were to lower the process priority we wouldn't be able to raise it back
+  // to its initial priority.
   NOTIMPLEMENTED();
   return false;
 }
-#endif  // !defined(OS_LINUX)
+#endif  // !defined(OS_LINUX) && !defined(OS_MACOSX)
 
 int Process::GetPriority() const {
   DCHECK(IsValid());