Clear ResourceFetcher::m_validatedURLs if too many entries are added

Source/core/fetch/ResourceFetcher.cpp

Index: Source/core/fetch/ResourceFetcher.cpp
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index 68f29110590e6be5b393177aaab507a390eda98f..4602757f546ffd5dca1eee6201659d04917ed57e 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -694,7 +694,11 @@ void ResourceFetcher::requestLoadStarted(Resource* resource, const FetchRequest&
             m_resourceTimingReportTimer.startOneShot(0, FROM_HERE);
     }
 
+    if (m_validatedURLsRingBuffer.size() >= 10000) {
+        m_validatedURLs.remove(m_validatedURLsRingBuffer.takeFirst());
+    }
     m_validatedURLs.add(request.resourceRequest().url());
+    m_validatedURLsRingBuffer.append(request.resourceRequest().url());
 }
 
 ResourcePtr<Resource> ResourceFetcher::requestResource(Resource::Type type, FetchRequest& request)