Timeline: add support for deferred canvas rasterization

Source/core/inspector/InspectorController.cpp

Index: Source/core/inspector/InspectorController.cpp
diff --git a/Source/core/inspector/InspectorController.cpp b/Source/core/inspector/InspectorController.cpp
index ec60e0c9b12ca499fe1e6c6e5b9103ccd9e9f2f6..d15527b95d3dec60d4ae38187bf615e3bc5e0ebd 100644
--- a/Source/core/inspector/InspectorController.cpp
+++ b/Source/core/inspector/InspectorController.cpp
@@ -441,6 +441,18 @@ void InspectorController::didComposite()
         timelineAgent->didComposite();
 }
 
+void InspectorController::willUpdateLayer(int layerId)
+{
+    if (InspectorTimelineAgent* timelineAgent = m_instrumentingAgents->inspectorTimelineAgent())
+        timelineAgent->willUpdateLayer(layerId);
+}
+
+void InspectorController::didUpdateLayer()
+{
+    if (InspectorTimelineAgent* timelineAgent = m_instrumentingAgents->inspectorTimelineAgent())
+        timelineAgent->didUpdateLayer();
+}
+
 HashMap<String, size_t> InspectorController::processMemoryDistribution() const
 {
     HashMap<String, size_t> memoryInfo;