VM: Re-format to use at most one newline between functions

runtime/vm/signal_handler.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_SIGNAL_HANDLER_H_
 #define RUNTIME_VM_SIGNAL_HANDLER_H_
 
 #include "vm/allocation.h"
 #include "vm/globals.h"
 
@@ skipping 20 matching lines @@
 #elif defined(HOST_OS_WINDOWS)
 // Stub out for windows.
 struct siginfo_t;
 struct mcontext_t;
 struct sigset_t {};
 #elif defined(HOST_OS_FUCHSIA)
 #include <signal.h>    // NOLINT
 #include <ucontext.h>  // NOLINT
 #endif
 
-
 // Old linux kernels on ARM might require a trampoline to
 // work around incorrect Thumb -> ARM transitions. See SignalHandlerTrampoline
 // below for more details.
 #if defined(HOST_ARCH_ARM) &&                                                  \
     (defined(HOST_OS_LINUX) || defined(HOST_OS_ANDROID)) &&                    \
     !defined(__thumb__)
 #define USE_SIGNAL_HANDLER_TRAMPOLINE
 #endif
 
-
 namespace dart {
 
 typedef void (*SignalAction)(int signal, siginfo_t* info, void* context);
 
 class SignalHandler : public AllStatic {
  public:
   template <SignalAction action>
   static void Install() {
 #if defined(USE_SIGNAL_HANDLER_TRAMPOLINE)
     InstallImpl(SignalHandlerTrampoline<action>);
@@ skipping 44 matching lines @@
     register siginfo_t* arg1 asm("r1") = info;
     register void* arg2 asm("r2") = context_;
     asm volatile("bx %3"
                  :
                  : "r"(arg0), "r"(arg1), "r"(arg2), "r"(action)
                  : "memory");
   }
 #endif  // defined(USE_SIGNAL_HANDLER_TRAMPOLINE)
 };
 
-
 #undef USE_SIGNAL_HANDLER_TRAMPOLINE
 
-
 }  // namespace dart
 
 #endif  // RUNTIME_VM_SIGNAL_HANDLER_H_