(NOT FOR COMMIT) Testing layer invalidation speedups.

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 1039 matching lines @@
     // TODO(chrishtr): stop invalidating the rects once FrameView::paintRecursively does so.
     m_layer->layer()->invalidate();
     for (size_t i = 0; i < m_linkHighlights.size(); ++i)
         m_linkHighlights[i]->invalidate();
     getPaintController().invalidateAll();
 
     if (isTrackingPaintInvalidations())
         trackPaintInvalidation(*this, FloatRect(FloatPoint(), m_size), PaintInvalidationFull);
 }
 
-void GraphicsLayer::setNeedsDisplayInRect(const IntRect& rect, PaintInvalidationReason invalidationReason, const DisplayItemClient& client)
+void GraphicsLayer::setNeedsDisplayInRect(const Vector<NeedsDisplayRecord>& rects)
 {
     if (!drawsContent())
         return;
 
-    m_layer->layer()->invalidateRect(rect);
-    if (firstPaintInvalidationTrackingEnabled())
-        m_debugInfo.appendAnnotatedInvalidateRect(rect, invalidationReason);
+    std::vector<blink::WebRect> offsetRects(rects.size());
+
+    for (size_t i = 0; i < rects.size(); ++i) {
+        IntRect rect = rects[i].r;
+        rect.move(-offsetFromLayoutObject());
+        offsetRects[i] = rect;
+    }
+
+    m_layer->layer()->invalidateRects(offsetRects);
+
+    if (firstPaintInvalidationTrackingEnabled()) {
+        for (size_t i = 0; i < rects.size(); ++i) {
+            IntRect rect = rects[i].r;
+            rect.move(-offsetFromLayoutObject());
+            m_debugInfo.appendAnnotatedInvalidateRect(rect, rects[i].invalidationReason);
+        }
+    }
+
     for (size_t i = 0; i < m_linkHighlights.size(); ++i)
         m_linkHighlights[i]->invalidate();
 
-    if (isTrackingPaintInvalidations())
-        trackPaintInvalidation(client, rect, invalidationReason);
+    if (isTrackingPaintInvalidations()) {
+        for (size_t i = 0; i < rects.size(); ++i) {
+            IntRect rect = rects[i].r;
+            rect.move(-offsetFromLayoutObject());
+            trackPaintInvalidation(rects[i].client, rect, rects[i].invalidationReason);
+        }
+    }
 }
 
 void GraphicsLayer::invalidateDisplayItemClient(const DisplayItemClient& displayItemClient, PaintInvalidationReason invalidationReason)
 {
     if (!drawsContent())
         return;
 
     getPaintController().invalidate(displayItemClient);
 
     if (isTrackingPaintInvalidations())
@@ skipping 145 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