[heap] Enfoce tighter allocation limit for large object allocations.

BUG=chromium:574953
LOG=n

Review URL: https://codereview.chromium.org/1570443004

Cr-Commit-Position: refs/heads/master@{#33179}

src/heap/heap.cc

@@ -942,7 +942,8 @@ bool Heap::CollectGarbage(GarbageCollector collector, const char* gc_reason,
 
   if (collector == MARK_COMPACTOR && !ShouldFinalizeIncrementalMarking() &&
       !ShouldAbortIncrementalMarking() && !incremental_marking()->IsStopped() &&
-      !incremental_marking()->should_hurry() && FLAG_incremental_marking) {
+      !incremental_marking()->should_hurry() && FLAG_incremental_marking &&
+      OldGenerationAllocationLimitReached()) {
     // Make progress in incremental marking.
     const intptr_t kStepSizeWhenDelayedByScavenge = 1 * MB;
     incremental_marking()->Step(kStepSizeWhenDelayedByScavenge,

src/heap/heap.h

@@ -825,7 +825,7 @@ class Heap {
 
   // TODO(hpayer): There is still a missmatch between capacity and actual
   // committed memory size.
-  bool CanExpandOldGeneration(int size) {
+  bool CanExpandOldGeneration(int size = 0) {
     if (force_oom_) return false;
     return (CommittedOldGenerationMemory() + size) < MaxOldGenerationSize();
   }

src/heap/spaces.cc

@@ -3100,8 +3100,7 @@ AllocationResult LargeObjectSpace::AllocateRaw(int object_size,
                                                Executability executable) {
   // Check if we want to force a GC before growing the old space further.
   // If so, fail the allocation.
-  if (!heap()->always_allocate() &&
-      !heap()->CanExpandOldGeneration(object_size)) {
+  if (!heap()->CanExpandOldGeneration(object_size)) {
     return AllocationResult::Retry(identity());
   }