PurgeMemory.

third_party/WebKit/Source/core/page/Page.cpp

Index: third_party/WebKit/Source/core/page/Page.cpp
diff --git a/third_party/WebKit/Source/core/page/Page.cpp b/third_party/WebKit/Source/core/page/Page.cpp
index 9830726680bd6e665bae72239def21426e537d17..c3d670ac31c5e1131926b01f7128087623df5139 100644
--- a/third_party/WebKit/Source/core/page/Page.cpp
+++ b/third_party/WebKit/Source/core/page/Page.cpp
@@ -523,6 +523,12 @@ void Page::purgeMemory(DeviceKind deviceKind)
 {
     if (deviceKind == DeviceKind::LowEnd)
         memoryCache()->pruneAll();
+
+    // Ask each frame to purge memory.
+    for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
+        if (frame->isLocalFrame())
+            toLocalFrame(frame)->purgeMemory(deviceKind);
+    }
 }
 
 DEFINE_TRACE(Page)