FirstMeaningfulPaint UMA

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 110 matching lines @@
     , m_contentsOpaque(false)
     , m_shouldFlattenTransform(true)
     , m_backfaceVisibility(true)
     , m_masksToBounds(false)
     , m_drawsContent(false)
     , m_contentsVisible(true)
     , m_isRootForIsolatedGroup(false)
     , m_hasScrollParent(false)
     , m_hasClipParent(false)
     , m_painted(false)
-    , m_textPainted(false)
-    , m_imagePainted(false)
     , m_isTrackingPaintInvalidations(client && client->isTrackingPaintInvalidations())
     , m_paintingPhase(GraphicsLayerPaintAllWithOverflowClip)
     , m_parent(0)
     , m_maskLayer(0)
     , m_contentsClippingMaskLayer(0)
     , m_replicaLayer(0)
     , m_replicatedLayer(0)
     , m_paintCount(0)
     , m_contentsLayer(0)
     , m_contentsLayerId(0)
@@ skipping 232 matching lines @@
     GraphicsContext context(getPaintController(), disabledMode);
 
     m_previousInterestRect = *interestRect;
     m_client->paintContents(this, context, m_paintingPhase, *interestRect);
     notifyFirstPaintToClient();
     return true;
 }
 
 void GraphicsLayer::notifyFirstPaintToClient()
 {
+    bool isFirstPaint = false;
     if (!m_painted) {
         DisplayItemList& itemList = m_paintController->newDisplayItemList();
         for (DisplayItem& item : itemList) {
             DisplayItem::Type type = item.getType();
             if (DisplayItem::isDrawingType(type) && type != DisplayItem::DocumentBackground && static_cast<const DrawingDisplayItem&>(item).picture()) {
                 m_painted = true;
-                m_client->notifyFirstPaint();
+                isFirstPaint = true;
                 break;
             }
         }
     }
-    if (!m_textPainted && m_paintController->textPainted()) {
-        m_textPainted = true;
-        m_client->notifyFirstTextPaint();
-    }
-    if (!m_imagePainted && m_paintController->imagePainted()) {
-        m_imagePainted = true;
-        m_client->notifyFirstImagePaint();
-    }
+    m_client->notifyPaint(isFirstPaint, m_paintController->textPainted(), m_paintController->imagePainted());
 }
 
 void GraphicsLayer::updateChildList()
 {
     WebLayer* childHost = m_layer->layer();
     childHost->removeAllChildren();
 
     clearContentsLayerIfUnregistered();
 
     if (m_contentsLayer) {
@@ skipping 944 matching lines @@
 {
     if (!layer) {
         fprintf(stderr, "Cannot showGraphicsLayerTree for (nil).\n");
         return;
     }
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif