[heap] Move a few methods from spaces.h to spaces.cc

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index 54ec7e37f22d70f9c2c0964197d6ffd4546d069b..1cd7257677223484eae6dd7f43322f97f01a1f12 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -882,23 +882,15 @@ class Space : public Malloced {
   // Identity used in error reporting.
   AllocationSpace identity() { return id_; }
 
-  virtual void AddAllocationObserver(AllocationObserver* observer) {
-    allocation_observers_->Add(observer);
-  }
+  V8_EXPORT_PRIVATE virtual void AddAllocationObserver(
+      AllocationObserver* observer);
 
-  virtual void RemoveAllocationObserver(AllocationObserver* observer) {
-    bool removed = allocation_observers_->RemoveElement(observer);
-    USE(removed);
-    DCHECK(removed);
-  }
+  V8_EXPORT_PRIVATE virtual void RemoveAllocationObserver(
+      AllocationObserver* observer);
 
-  virtual void PauseAllocationObservers() {
-    allocation_observers_paused_ = true;
-  }
+  V8_EXPORT_PRIVATE virtual void PauseAllocationObservers();
 
-  virtual void ResumeAllocationObservers() {
-    allocation_observers_paused_ = false;
-  }
+  V8_EXPORT_PRIVATE virtual void ResumeAllocationObservers();
 
   void AllocationStep(Address soon_object, int size);