[Experiment] purge-and-suspend

third_party/WebKit/Source/core/dom/StyleEngine.cpp

Index: third_party/WebKit/Source/core/dom/StyleEngine.cpp
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.cpp b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
index f6628b6448252e74358d5de8bdf1a83e0f12c688..4a9a73bf46cd73e282b3b891f1bc02cb6ae6bd96 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
@@ -811,6 +811,14 @@ void StyleEngine::keyframesRulesAdded()
     document().timeline().invalidateKeyframeEffects();
 }
 
+void StyleEngine::purgeMemory()
+{
+    clearFontCache();
+    clearResolver();
+    m_textToSheetCache.clear();
+    m_sheetToTextCache.clear();
+}
+
 DEFINE_TRACE(StyleEngine)
 {
     visitor->trace(m_document);