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

runtime/vm/heap.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_HEAP_H_
 #define RUNTIME_VM_HEAP_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/flags.h"
@@ skipping 297 matching lines @@
   // Visit all objects, including FreeListElement "objects". Caller must ensure
   // concurrent sweeper is not running, and the visitor must not allocate.
   void VisitObjects(ObjectVisitor* visitor) const;
   void VisitObjectsNoImagePages(ObjectVisitor* visitor) const;
   void VisitObjectsImagePages(ObjectVisitor* visitor) const;
 
   // Like Verify, but does not wait for concurrent sweeper, so caller must
   // ensure thread-safety.
   bool VerifyGC(MarkExpectation mark_expectation = kForbidMarked) const;
 
-
   // Helper functions for garbage collection.
   void CollectNewSpaceGarbage(Thread* thread,
                               ApiCallbacks api_callbacks,
                               GCReason reason);
   void CollectOldSpaceGarbage(Thread* thread,
                               ApiCallbacks api_callbacks,
                               GCReason reason);
   void EvacuateNewSpace(Thread* thread, GCReason reason);
 
   // GC stats collection.
@@ skipping 39 matching lines @@
   friend class ObjectGraph;  // VisitObjects
   friend class Unmarker;     // VisitObjects
   friend class ServiceEvent;
   friend class PageSpace;             // VerifyGC
   friend class IsolateReloadContext;  // VisitObjects
   friend class ClassFinalizer;        // VisitObjects
 
   DISALLOW_COPY_AND_ASSIGN(Heap);
 };
 
-
 class HeapIterationScope : public StackResource {
  public:
   explicit HeapIterationScope(bool writable = false);
   ~HeapIterationScope();
 
  private:
   NoSafepointScope no_safepoint_scope_;
   PageSpace* old_space_;
   bool writable_;
 
   DISALLOW_COPY_AND_ASSIGN(HeapIterationScope);
 };
 
-
 class NoHeapGrowthControlScope : public StackResource {
  public:
   NoHeapGrowthControlScope();
   ~NoHeapGrowthControlScope();
 
  private:
   bool current_growth_controller_state_;
   DISALLOW_COPY_AND_ASSIGN(NoHeapGrowthControlScope);
 };
 
-
 // Note: During this scope, the code pages are non-executable.
 class WritableVMIsolateScope : StackResource {
  public:
   explicit WritableVMIsolateScope(Thread* thread);
   ~WritableVMIsolateScope();
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_HEAP_H_