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

runtime/vm/code_observers.cc

 // 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.
 
-
 #include "vm/code_observers.h"
 
 #include "vm/os.h"
 #include "vm/os_thread.h"
 
 namespace dart {
 
 #ifndef PRODUCT
 
 Mutex* CodeObservers::mutex_ = NULL;
 intptr_t CodeObservers::observers_length_ = 0;
 CodeObserver** CodeObservers::observers_ = NULL;
 
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 void CodeObservers::Register(CodeObserver* observer) {
   observers_length_++;
   observers_ = reinterpret_cast<CodeObserver**>(
       realloc(observers_, sizeof(observer) * observers_length_));
   if (observers_ == NULL) {
     FATAL("failed to grow code observers array");
   }
   observers_[observers_length_ - 1] = observer;
 }
 
-
 void CodeObservers::NotifyAll(const char* name,
                               uword base,
                               uword prologue_offset,
                               uword size,
                               bool optimized) {
   ASSERT(!AreActive() || (strlen(name) != 0));
   for (intptr_t i = 0; i < observers_length_; i++) {
     if (observers_[i]->IsActive()) {
       observers_[i]->Notify(name, base, prologue_offset, size, optimized);
     }
   }
 }
 
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 bool CodeObservers::AreActive() {
   for (intptr_t i = 0; i < observers_length_; i++) {
     if (observers_[i]->IsActive()) return true;
   }
   return false;
 }
 
-
 void CodeObservers::DeleteAll() {
   for (intptr_t i = 0; i < observers_length_; i++) {
     delete observers_[i];
   }
   free(observers_);
   observers_length_ = 0;
   observers_ = NULL;
 }
 
-
 void CodeObservers::InitOnce() {
   ASSERT(mutex_ == NULL);
   mutex_ = new Mutex();
   ASSERT(mutex_ != NULL);
   OS::RegisterCodeObservers();
 }
 
-
 #endif  // !PRODUCT
 
 }  // namespace dart