Explicitly initialize MarkCompactCollector and ExternalStringTable

BUG=none
R=dcarney@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/143063003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18689 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -134,6 +134,7 @@ Heap::Heap()
       last_gc_end_timestamp_(0.0),
       marking_time_(0.0),
       sweeping_time_(0.0),
+      mark_compact_collector_(this),
       store_buffer_(this),
       marking_(this),
       incremental_marking_(this),
@@ -152,6 +153,7 @@ Heap::Heap()
       allocation_sites_scratchpad_length(0),
       promotion_queue_(this),
       configured_(false),
+      external_string_table_(this),
       chunks_queued_for_free_(NULL),
       relocation_mutex_(NULL) {
   // Allow build-time customization of the max semispace size. Building
@@ -177,8 +179,6 @@ Heap::Heap()
   native_contexts_list_ = NULL;
   array_buffers_list_ = Smi::FromInt(0);
   allocation_sites_list_ = Smi::FromInt(0);
-  mark_compact_collector_.heap_ = this;
-  external_string_table_.heap_ = this;
   // Put a dummy entry in the remembered pages so we can find the list the
   // minidump even if there are no real unmapped pages.
   RememberUnmappedPage(NULL, false);

src/heap.h

@@ -462,7 +462,7 @@ class ExternalStringTable {
   void TearDown();
 
  private:
-  ExternalStringTable() { }
+  explicit ExternalStringTable(Heap* heap) : heap_(heap) { }
 
   friend class Heap;
 

src/mark-compact.cc

@@ -56,7 +56,7 @@ const char* Marking::kImpossibleBitPattern = "01";
 // -------------------------------------------------------------------------
 // MarkCompactCollector
 
-MarkCompactCollector::MarkCompactCollector() :  // NOLINT
+MarkCompactCollector::MarkCompactCollector(Heap* heap) :  // NOLINT
 #ifdef DEBUG
       state_(IDLE),
 #endif
@@ -70,7 +70,7 @@ MarkCompactCollector::MarkCompactCollector() :  // NOLINT
       sequential_sweeping_(false),
       tracer_(NULL),
       migration_slots_buffer_(NULL),
-      heap_(NULL),
+      heap_(heap),
       code_flusher_(NULL),
       encountered_weak_collections_(NULL),
       have_code_to_deoptimize_(false) { }

src/mark-compact.h

@@ -744,7 +744,7 @@ class MarkCompactCollector {
   void MarkAllocationSite(AllocationSite* site);
 
  private:
-  MarkCompactCollector();
+  explicit MarkCompactCollector(Heap* heap);
   ~MarkCompactCollector();
 
   bool MarkInvalidatedCode();