Add retry logic to partition alloc

Source/web/WebKit.cpp

Index: Source/web/WebKit.cpp
diff --git a/Source/web/WebKit.cpp b/Source/web/WebKit.cpp
index a6d8754f039f03651bf6d9c7c4ae1cc86cba318e..bc93ccb6aa27231197d420c666ae3c6c054d2260 100644
--- a/Source/web/WebKit.cpp
+++ b/Source/web/WebKit.cpp
@@ -82,6 +82,13 @@ public:
     }
 };
 
+void partitionAlmostFullHandler()
+{
+    v8::Isolate* isolate = v8::Isolate::GetCurrent();
+    if (isolate)
+        isolate->LowMemoryNotification();
+}
+
 } // namespace
 
 static WebThread::TaskObserver* s_endOfTaskRunner = 0;
@@ -109,6 +116,8 @@ void initialize(Platform* platform)
         s_endOfTaskRunner = new EndOfTaskRunner;
         currentThread->addTaskObserver(s_endOfTaskRunner);
     }
+
+    partitionSetFreeUpMemoryCallback(partitionAlmostFullHandler);
 }
 
 v8::Isolate* mainThreadIsolate()
@@ -205,6 +214,8 @@ void shutdown()
         s_messageLoopInterruptor = 0;
     }
 
+    partitionSetFreeUpMemoryCallback(nullptr);
+
     v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();
     V8PerIsolateData::willBeDestroyed(isolate);