Make Heap::AllocateRawFixedArray methods private.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index cb979a63716a9a4e7bdf72f344e93aae86d303a6..9b667fc2c49feaef5140476a960a5df60aa51c6a 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -948,10 +948,6 @@ class Heap {
       int length,
       PretenureFlag pretenure = NOT_TENURED);
 
-  MUST_USE_RESULT MaybeObject* AllocateRawFixedDoubleArray(
-      int length,
-      PretenureFlag pretenure);
-
   // Allocates a fixed double array with uninitialized values. Returns
   // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed.
   // Please note this does not perform a garbage collection.
@@ -1502,11 +1498,6 @@ class Heap {
   inline intptr_t AdjustAmountOfExternalAllocatedMemory(
       intptr_t change_in_bytes);
 
-  // Allocate uninitialized fixed array.
-  MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(int length);
-  MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(int length,
-                                                     PretenureFlag pretenure);
-
   // This is only needed for testing high promotion mode.
   void SetNewSpaceHighPromotionModeActive(bool mode) {
     new_space_high_promotion_mode_active_ = mode;
@@ -2080,6 +2071,18 @@ class Heap {
   // Allocate an uninitialized object in the global property cell space.
   MUST_USE_RESULT inline MaybeObject* AllocateRawPropertyCell();
 
+  // Allocate an uninitialized fixed array.
+  MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(
+      int length, PretenureFlag pretenure);
+
+  // Allocate an uninitialized fixed double array.
+  MUST_USE_RESULT MaybeObject* AllocateRawFixedDoubleArray(
+      int length, PretenureFlag pretenure);
+
+  // Allocate an initialized fixed array with the given filler value.
+  MUST_USE_RESULT MaybeObject* AllocateFixedArrayWithFiller(
+      int length, PretenureFlag pretenure, Object* filler);
+
   // Initializes a JSObject based on its map.
   void InitializeJSObjectFromMap(JSObject* obj,
                                  FixedArray* properties,