Revert of "[heap] Switch to 500k pages"

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index 93106c13ed992e47a3fea960b8f980ad6f5353a8..de5ea1b16adc399a977885f4bacffda9c8b22263 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -235,10 +235,7 @@
     IN_TO_SPACE,    // All pages in new space has one of these two set.
     NEW_SPACE_BELOW_AGE_MARK,
     EVACUATION_CANDIDATE,
-
-    // |NEVER_EVACUATE|: A page tagged with this flag will never be selected
-    // for evacuation. Typically used for immortal immovable pages.
-    NEVER_EVACUATE,
+    NEVER_EVACUATE,  // May contain immortal immutables.
 
     // Large objects can have a progress bar in their page header. These object
     // are scanned in increments and will be kept black while being scanned.
@@ -725,7 +722,7 @@
   // account.
   // TODO(hpayer): This limit should be way smaller but we currently have
   // short living objects >256K.
-  static const int kMaxRegularHeapObjectSize = 400 * KB;
+  static const int kMaxRegularHeapObjectSize = 600 * KB;
 
   static inline Page* ConvertNewToOld(Page* old_page, PagedSpace* new_owner);
 
@@ -825,8 +822,6 @@
   void add_available_in_free_list(intptr_t available) {
     available_in_free_list_.Increment(available);
   }
-
-  size_t ShrinkToHighWaterMark();
 
 #ifdef DEBUG
   void Print();
@@ -1319,8 +1314,6 @@
   MemoryChunk* AllocateChunk(intptr_t reserve_area_size,
                              intptr_t commit_area_size,
                              Executability executable, Space* space);
-
-  void ShrinkChunk(MemoryChunk* chunk, size_t bytes_to_shrink);
 
   Address ReserveAlignedMemory(size_t requested, size_t alignment,
                                base::VirtualMemory* controller);
@@ -2203,10 +2196,6 @@
   iterator begin() { return iterator(anchor_.next_page()); }
   iterator end() { return iterator(&anchor_); }
 
-  // Shrink immortal immovable pages of the space to be exactly the size needed
-  // using the high water mark.
-  void ShrinkImmortalImmovablePages();
-
  protected:
   // PagedSpaces that should be included in snapshots have different, i.e.,
   // smaller, initial pages.