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

runtime/bin/eventhandler_macos.h

Index: runtime/bin/eventhandler_macos.h
diff --git a/runtime/bin/eventhandler_macos.h b/runtime/bin/eventhandler_macos.h
index 414dfbef2771c0d7cce81796117ee310bda871ca..c8ed3ba6adfa8f643fa1b67c2b6d57c3e7c3a4e1 100644
--- a/runtime/bin/eventhandler_macos.h
+++ b/runtime/bin/eventhandler_macos.h
@@ -17,7 +17,6 @@
 #include "platform/hashmap.h"
 #include "platform/signal_blocker.h"
 
-
 namespace dart {
 namespace bin {
 
@@ -50,7 +49,6 @@ class DescriptorInfo : public DescriptorInfoBase {
   DISALLOW_COPY_AND_ASSIGN(DescriptorInfo);
 };
 
-
 class DescriptorInfoSingle : public DescriptorInfoSingleMixin<DescriptorInfo> {
  public:
   explicit DescriptorInfoSingle(intptr_t fd)
@@ -61,7 +59,6 @@ class DescriptorInfoSingle : public DescriptorInfoSingleMixin<DescriptorInfo> {
   DISALLOW_COPY_AND_ASSIGN(DescriptorInfoSingle);
 };
 
-
 class DescriptorInfoMultiple
     : public DescriptorInfoMultipleMixin<DescriptorInfo> {
  public:
@@ -73,7 +70,6 @@ class DescriptorInfoMultiple
   DISALLOW_COPY_AND_ASSIGN(DescriptorInfoMultiple);
 };
 
-
 class EventHandlerImplementation {
  public:
   EventHandlerImplementation();