Revert r241672, which breaks the OS X build by introducing a dependency on
platform-specific symbols that are not implemented on OS X.

The build error that caused this is

Undefined symbols for architecture x86_64:
  "lldb_private::NativeProcessProtocol::Attach(unsigned long long, lldb_private::NativeProcessProtocol::NativeDelegate&, std::__1::shared_ptr<lldb_private::NativeProcessProtocol>&)", referenced from:
      lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS::AttachToProcess(unsigned long long) in liblldb-core.a(GDBRemoteCommunicationServerLLGS.o)
  "lldb_private::NativeProcessProtocol::Launch(lldb_private::ProcessLaunchInfo&, lldb_private::NativeProcessProtocol::NativeDelegate&, std::__1::shared_ptr<lldb_private::NativeProcessProtocol>&)", referenced from:
      lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS::LaunchProcess() in liblldb-core.a(GDBRemoteCommunicationServerLLGS.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

llvm-svn: 241688
diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h
index e3832d6..fa87704 100644
--- a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h
+++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.h
@@ -40,17 +40,21 @@
     /// Changes in the inferior process state are broadcasted.
     class NativeProcessLinux: public NativeProcessProtocol
     {
-        friend Error
-        NativeProcessProtocol::Launch (ProcessLaunchInfo &launch_info,
-                NativeDelegate &native_delegate,
-                NativeProcessProtocolSP &process_sp);
+    public:
 
-        friend Error
-        NativeProcessProtocol::Attach (lldb::pid_t pid,
+        static Error
+        LaunchProcess (
+            Module *exe_module,
+            ProcessLaunchInfo &launch_info,
             NativeProcessProtocol::NativeDelegate &native_delegate,
             NativeProcessProtocolSP &native_process_sp);
 
-    public:
+        static Error
+        AttachToProcess (
+            lldb::pid_t pid,
+            NativeProcessProtocol::NativeDelegate &native_delegate,
+            NativeProcessProtocolSP &native_process_sp);
+
         //------------------------------------------------------------------------------
         /// @class Operation
         /// @brief Represents a NativeProcessLinux operation.