Don't call LayoutPart::widgetPositionsUpdated unnecessarily.

third_party/WebKit/Source/web/WebPluginContainerImpl.cpp

Index: third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp b/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
index e74496a28d6d739012060c40aabbb06479af9502..ee1ca8cfdd3727e550b97e5e71d00fbc2d2d08aa 100644
--- a/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
+++ b/third_party/WebKit/Source/web/WebPluginContainerImpl.cpp
@@ -105,7 +105,6 @@ namespace blink {
 void WebPluginContainerImpl::setFrameRect(const IntRect& frameRect)
 {
     Widget::setFrameRect(frameRect);
-    reportGeometry();

[wkorman, 2015/12/14 23:22:10]

So this was just spurious over-reporting, and reportGeometry() always still ends
up being called through eventual calls into
WebPluginContainerImpl::widgetGeometryMayHaveChanged() instead?

 }
 
 void WebPluginContainerImpl::layoutIfNeeded()
@@ -221,9 +220,9 @@ void WebPluginContainerImpl::frameRectsChanged()
     reportGeometry();
 }
 
-void WebPluginContainerImpl::widgetPositionsUpdated()
+void WebPluginContainerImpl::widgetGeometryMayHaveChanged()
 {
-    Widget::widgetPositionsUpdated();
+    Widget::widgetGeometryMayHaveChanged();
     reportGeometry();
 }