Let GC select the collector when the external memory allocation limit is reached

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

Review URL: https://codereview.chromium.org/1201993002

Cr-Commit-Position: refs/heads/master@{#29235}

include/v8.h

@@ -5923,7 +5923,7 @@ class V8_EXPORT Isolate {
   void SetObjectGroupId(internal::Object** object, UniqueId id);
   void SetReferenceFromGroup(UniqueId id, internal::Object** object);
   void SetReference(internal::Object** parent, internal::Object** child);
-  void CollectAllGarbage(const char* gc_reason);
+  void CollectGarbage(const char* gc_reason);
 };
 
 class V8_EXPORT StartupData {
@@ -8163,7 +8163,7 @@ int64_t Isolate::AdjustAmountOfExternalAllocatedMemory(
   if (change_in_bytes > 0 &&
       amount - *amount_of_external_allocated_memory_at_last_global_gc >
           I::kExternalAllocationLimit) {
-    CollectAllGarbage("external memory allocation limit reached.");
+    CollectGarbage("external memory allocation limit reached.");
   }
   *amount_of_external_allocated_memory = amount;
   return *amount_of_external_allocated_memory;

src/api.cc

@@ -6866,9 +6866,9 @@ Local<Integer> v8::Integer::NewFromUnsigned(Isolate* isolate, uint32_t value) {
 }
 
 
-void Isolate::CollectAllGarbage(const char* gc_reason) {
-  reinterpret_cast<i::Isolate*>(this)->heap()->CollectAllGarbage(
-      i::Heap::kNoGCFlags, gc_reason);
+void Isolate::CollectGarbage(const char* gc_reason) {
+  reinterpret_cast<i::Isolate*>(this)->heap()->CollectGarbage(i::NEW_SPACE,
+                                                              gc_reason);
 }