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

runtime/vm/zone.h

Index: runtime/vm/zone.h
diff --git a/runtime/vm/zone.h b/runtime/vm/zone.h
index 349168194824eb62a1f3f17d9a0baf53ece3bded..b65d2df16c44ab4621acac9662ebfc524e7a8605 100644
--- a/runtime/vm/zone.h
+++ b/runtime/vm/zone.h
@@ -9,8 +9,8 @@
 #include "vm/allocation.h"
 #include "vm/handles.h"
 #include "vm/json_stream.h"
-#include "vm/thread.h"
 #include "vm/memory_region.h"
+#include "vm/thread.h"
 
 namespace dart {
 
@@ -42,7 +42,6 @@ class Zone {
   // responsible for avoiding integer overflow yourself.
   inline uword AllocUnsafe(intptr_t size);
 
-
   // Make a copy of the string in the zone allocated area.
   char* MakeCopyOfString(const char* str);
 
@@ -165,7 +164,6 @@ class Zone {
   DISALLOW_COPY_AND_ASSIGN(Zone);
 };
 
-
 class StackZone : public StackResource {
  public:
   // Create an empty zone and set is at the current zone for the Thread.
@@ -217,7 +215,6 @@ inline uword Zone::AllocUnsafe(intptr_t size) {
   return result;
 }
 
-
 template <class ElementType>
 inline void Zone::CheckLength(intptr_t len) {
   const intptr_t kElementSize = sizeof(ElementType);
@@ -227,7 +224,6 @@ inline void Zone::CheckLength(intptr_t len) {
   }
 }
 
-
 template <class ElementType>
 inline ElementType* Zone::Alloc(intptr_t len) {
   CheckLength<ElementType>(len);