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

runtime/vm/compiler.h

Index: runtime/vm/compiler.h
diff --git a/runtime/vm/compiler.h b/runtime/vm/compiler.h
index 1b0d079871ccb280013f2702ccaabb0ca13839ea..4b121af5f43d3e72a02710b303af27d5f19744b0 100644
--- a/runtime/vm/compiler.h
+++ b/runtime/vm/compiler.h
@@ -43,7 +43,6 @@ class CompilationPipeline : public ZoneAllocated {
   virtual ~CompilationPipeline() {}
 };
 
-
 class DartCompilationPipeline : public CompilationPipeline {
  public:
   virtual void ParseFunction(ParsedFunction* parsed_function);
@@ -57,7 +56,6 @@ class DartCompilationPipeline : public CompilationPipeline {
   virtual void FinalizeCompilation(FlowGraph* flow_graph);
 };
 
-
 class IrregexpCompilationPipeline : public CompilationPipeline {
  public:
   IrregexpCompilationPipeline() : backtrack_goto_(NULL) {}
@@ -76,7 +74,6 @@ class IrregexpCompilationPipeline : public CompilationPipeline {
   IndirectGotoInstr* backtrack_goto_;
 };
 
-
 class Compiler : public AllStatic {
  public:
   static const intptr_t kNoOSRDeoptId = Thread::kNoDeoptId;
@@ -157,7 +154,6 @@ class Compiler : public AllStatic {
   static void AbortBackgroundCompilation(intptr_t deopt_id, const char* msg);
 };
 
-
 // Class to run optimizing compilation in a background thread.
 // Current implementation: one task per isolate, it dies with the owning
 // isolate.