Remove default heap size limit and add separate limit for externals.

runtime/vm/heap.h

Index: runtime/vm/heap.h
===================================================================
--- runtime/vm/heap.h	(revision 43033)
+++ runtime/vm/heap.h	(working copy)
@@ -58,9 +58,7 @@
     kGCTestCase,
   };
 
-  // Default allocation sizes in MB for the old gen and code heaps.
-  static const intptr_t kHeapSizeInMWords = 128;
-  static const intptr_t kHeapSizeInMB = kHeapSizeInMWords * kWordSize;
+  // Default allocation sizes in MB for the code heap.
   static const intptr_t kCodeHeapSizeInMB = 18;

[Ivan Posva, 2015/01/22 01:45:15]

Where is kCodeHeapSizeInMB being used?

[koda, 2015/01/22 03:26:08]

Nowhere! Remove.

 
 #if defined(DEBUG)
@@ -161,7 +159,8 @@
   // Initialize the heap and register it with the isolate.
   static void Init(Isolate* isolate,
                    intptr_t max_new_gen_words,
-                   intptr_t max_old_gen_words);
+                   intptr_t max_old_gen_words,
+                   intptr_t max_external_words);
 
   // Verify that all pointers in the heap point to the heap.
   bool Verify(MarkExpectation mark_expectation = kForbidMarked) const;
@@ -284,7 +283,8 @@
 
   Heap(Isolate* isolate,
        intptr_t max_new_gen_semi_words,  // Max capacity of new semi-space.
-       intptr_t max_old_gen_words);
+       intptr_t max_old_gen_words,
+       intptr_t max_external_words);
 
   uword AllocateNew(intptr_t size);
   uword AllocateOld(intptr_t size, HeapPage::PageType type);