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

runtime/vm/os_thread.h

Index: runtime/vm/os_thread.h
diff --git a/runtime/vm/os_thread.h b/runtime/vm/os_thread.h
index 48d3b0c0e852b9a993f610f316459395f071752d..b7f70d0a03590e71f3b8db49dedc91e0fa118821 100644
--- a/runtime/vm/os_thread.h
+++ b/runtime/vm/os_thread.h
@@ -48,7 +48,6 @@ class BaseThread {
   DISALLOW_IMPLICIT_CONSTRUCTORS(BaseThread);
 };
 
-
 // Low-level operations on OS platform threads.
 class OSThread : public BaseThread {
  public:
@@ -255,7 +254,6 @@ class OSThread : public BaseThread {
   friend class ThreadInterrupterFuchsia;
 };
 
-
 // Note that this takes the thread list lock, prohibiting threads from coming
 // on- or off-line.
 class OSThreadIterator : public ValueObject {
@@ -273,7 +271,6 @@ class OSThreadIterator : public ValueObject {
   OSThread* next_;
 };
 
-
 class Mutex {
  public:
   Mutex();
@@ -311,7 +308,6 @@ class Mutex {
   DISALLOW_COPY_AND_ASSIGN(Mutex);
 };
 
-
 class Monitor {
  public:
   enum WaitResult { kNotified, kTimedOut };
@@ -356,8 +352,6 @@ class Monitor {
   DISALLOW_COPY_AND_ASSIGN(Monitor);
 };
 
-
 }  // namespace dart
 
-
 #endif  // RUNTIME_VM_OS_THREAD_H_