Oilpan: Give a chance to schedule a precise GC after V8 minor and major GCs

Source/platform/heap/ThreadState.cpp

Index: Source/platform/heap/ThreadState.cpp
diff --git a/Source/platform/heap/ThreadState.cpp b/Source/platform/heap/ThreadState.cpp
index 8126e720f54d9987347a98d46e4abeace17f9bd2..a6f33018f482969fc7ba57ef9a9f26bd31ccec49 100644
--- a/Source/platform/heap/ThreadState.cpp
+++ b/Source/platform/heap/ThreadState.cpp
@@ -657,6 +657,11 @@ bool ThreadState::shouldSchedulePreciseGC()
 #endif
 }
 
+bool ThreadState::shouldScheduleV8FollowupGC()
+{
+    return judgeGCThreshold(32 * 1024 * 1024, 1.5);
+}
+
 bool ThreadState::shouldSchedulePageNavigationGC(float estimatedRemovalRatio)
 {
     return judgeGCThreshold(1024 * 1024, 1.5 * (1 - estimatedRemovalRatio));
@@ -668,6 +673,21 @@ bool ThreadState::shouldForceConservativeGC()
     return judgeGCThreshold(32 * 1024 * 1024, 5.0);
 }
 
+void ThreadState::scheduleV8FollowupGCIfNeeded()
+{
+    ASSERT(checkThread());
+    if (isGCForbidden())
+        return;
+
+    if (isSweepingInProgress())
+        return;
+    ASSERT(!sweepForbidden());
+
+    Heap::reportMemoryUsageForTracing();
+    if (shouldScheduleV8FollowupGC())
+        schedulePreciseGC();
+}
+
 void ThreadState::schedulePageNavigationGCIfNeeded(float estimatedRemovalRatio)
 {
     ASSERT(checkThread());