Revert "Signal handling."

runtime/bin/process.cc

Index: runtime/bin/process.cc
diff --git a/runtime/bin/process.cc b/runtime/bin/process.cc
index ebafedd28bf3e906e28990ff70e97f5d20abf31b..3c34a47517510aab6b9af38b3b15ede33c8fb3fe 100644
--- a/runtime/bin/process.cc
+++ b/runtime/bin/process.cc
@@ -243,23 +243,6 @@ void FUNCTION_NAME(Process_Pid)(Dart_NativeArguments args) {
 }
 
 
-void FUNCTION_NAME(Process_SetSignalHandler)(Dart_NativeArguments args) {
-  intptr_t signal = DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 0));
-  intptr_t id = Process::SetSignalHandler(signal);
-  if (id == -1) {
-    Dart_SetReturnValue(args, DartUtils::NewDartOSError());
-  } else {
-    Dart_SetReturnValue(args, Dart_NewInteger(id));
-  }
-}
-
-
-void FUNCTION_NAME(Process_ClearSignalHandler)(Dart_NativeArguments args) {
-  intptr_t signal = DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 0));
-  Process::ClearSignalHandler(signal);
-}
-
-
 Dart_Handle Process::GetProcessIdNativeField(Dart_Handle process,
                                              intptr_t* pid) {
   return Dart_GetNativeInstanceField(process, kProcessIdNativeField, pid);