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

runtime/vm/instructions_arm.h

Index: runtime/vm/instructions_arm.h
diff --git a/runtime/vm/instructions_arm.h b/runtime/vm/instructions_arm.h
index c4f48110d9b470e162baba4663ea082bb61819b9..0738d64cec10a2f68f377ce10d877bfce86d0c94 100644
--- a/runtime/vm/instructions_arm.h
+++ b/runtime/vm/instructions_arm.h
@@ -47,7 +47,6 @@ class InstructionPattern : public AllStatic {
                                       intptr_t* index);
 };
 
-
 class CallPattern : public ValueObject {
  public:
   CallPattern(uword pc, const Code& code);
@@ -69,7 +68,6 @@ class CallPattern : public ValueObject {
   DISALLOW_COPY_AND_ASSIGN(CallPattern);
 };
 
-
 class NativeCallPattern : public ValueObject {
  public:
   NativeCallPattern(uword pc, const Code& code);
@@ -90,7 +88,6 @@ class NativeCallPattern : public ValueObject {
   DISALLOW_COPY_AND_ASSIGN(NativeCallPattern);
 };
 
-
 // Instance call that can switch between a direct monomorphic call, an IC call,
 // and a megamorphic call.
 //   load guarded cid            load ICData             load MegamorphicCache
@@ -113,7 +110,6 @@ class SwitchableCallPattern : public ValueObject {
   DISALLOW_COPY_AND_ASSIGN(SwitchableCallPattern);
 };
 
-
 class ReturnPattern : public ValueObject {
  public:
   explicit ReturnPattern(uword pc);