Flush recompile jobs on last-resort GC.

R=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/24145011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16922 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/heap.cc

@@ -608,6 +608,11 @@ void Heap::CollectAllAvailableGarbage(const char* gc_reason) {
   // Note: as weak callbacks can execute arbitrary code, we cannot
   // hope that eventually there will be no weak callbacks invocations.
   // Therefore stop recollecting after several attempts.
+  if (FLAG_concurrent_recompilation) {
+    // The optimizing compiler may be unnecessarily holding on to memory.
+    DisallowHeapAllocation no_recursive_gc;
+    isolate()->optimizing_compiler_thread()->Flush();
+  }
   mark_compact_collector()->SetFlags(kMakeHeapIterableMask |
                                      kReduceMemoryFootprintMask);
   isolate_->compilation_cache()->Clear();