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

runtime/vm/tags.h

Index: runtime/vm/tags.h
diff --git a/runtime/vm/tags.h b/runtime/vm/tags.h
index 66ab39eee8e76649a14d12f1a4b8ad3254e6682f..42320c3f72fc86a6ffe2dd67d773c68aba4ba045 100644
--- a/runtime/vm/tags.h
+++ b/runtime/vm/tags.h
@@ -76,7 +76,6 @@ class VMTag : public AllStatic {
   static TagEntry entries_[];
 };
 
-
 class VMTagScope : StackResource {
  public:
   VMTagScope(Thread* thread, uword tag, bool conditional_set = true);
@@ -89,7 +88,6 @@ class VMTagScope : StackResource {
   DISALLOW_IMPLICIT_CONSTRUCTORS(VMTagScope);
 };
 
-
 class VMTagCounters {
  public:
   VMTagCounters();
@@ -106,7 +104,6 @@ class VMTagCounters {
   int64_t counters_[VMTag::kNumVMTags];
 };
 
-
 class UserTags : public AllStatic {
  public:
   // UserTag id space: [kUserTagIdOffset, kUserTagIdOffset + kMaxUserTags).
@@ -120,7 +117,6 @@ class UserTags : public AllStatic {
   }
 };
 
-
 }  // namespace dart
 
 #endif  // RUNTIME_VM_TAGS_H_