Adjust kPagesPerChunk to 16 instead of 64 on Android....

src/spaces.cc

Index: src/spaces.cc
===================================================================
--- src/spaces.cc	(revision 2459)
+++ src/spaces.cc	(working copy)
@@ -725,11 +725,15 @@
   Page* current_page = top_page->next_page();
   // Loop over the pages to the end of the space.
   while (current_page->is_valid()) {
+#if defined(ANDROID)
+    // Free all chunks if possible
+#else
     // Advance last_page_to_keep every other step to end up at the midpoint.
     if ((free_pages & 0x1) == 1) {
       pages_to_keep++;
       last_page_to_keep = last_page_to_keep->next_page();
     }
+#endif
     free_pages++;
     current_page = current_page->next_page();
   }