[Experiment] purge-and-suspend

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

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 063abb03f90b2b3e0d45974732d43eafb74beb80..b5cf637144af79fe31b935b227ce0670efbc9ee6 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -5939,6 +5939,20 @@ LayoutViewItem Document::layoutViewItem() const
     return LayoutViewItem(m_layoutView);
 }
 
+void Document::purgeMemory()
+{
+    m_styleEngine->purgeMemory();
+    if (&axObjectCacheOwner() == this)
+        clearAXObjectCache();
+
+    if (m_fetcher)
+        m_fetcher->purgeMemory();
+
+    m_selectorQueryCache.reset();
+    m_canvasFontCache.clear();
+    m_mediaQueryMatcher.clear();
+}
+
 DEFINE_TRACE(Document)
 {
     visitor->trace(m_importsController);