Revert "[heap] Optimize NewSpace::AllocatedSinceLastGC"

src/heap/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 #include <map>
 
@@ skipping 1240 matching lines @@
   inline intptr_t PromotedTotalSize() {
     int64_t total = PromotedSpaceSizeOfObjects() + PromotedExternalMemorySize();
     if (total > std::numeric_limits<intptr_t>::max()) {
       // TODO(erikcorry): Use uintptr_t everywhere we do heap size calculations.
       return std::numeric_limits<intptr_t>::max();
     }
     if (total < 0) return 0;
     return static_cast<intptr_t>(total);
   }
 
-  V8_INLINE void UpdateNewSpaceAllocationCounter();
-  V8_INLINE size_t NewSpaceAllocationCounter();
+  void UpdateNewSpaceAllocationCounter() {
+    new_space_allocation_counter_ = NewSpaceAllocationCounter();
+  }
+
+  size_t NewSpaceAllocationCounter() {
+    return new_space_allocation_counter_ + new_space()->AllocatedSinceLastGC();
+  }
 
   // This should be used only for testing.
   void set_new_space_allocation_counter(size_t new_value) {
     new_space_allocation_counter_ = new_value;
   }
 
   void UpdateOldGenerationAllocationCounter() {
     old_generation_allocation_counter_ = OldGenerationAllocationCounter();
   }
 
@@ skipping 1378 matching lines @@
   friend class LargeObjectSpace;
   friend class NewSpace;
   friend class PagedSpace;
   DISALLOW_COPY_AND_ASSIGN(AllocationObserver);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_H_