(NOT FOR COMMIT) Testing layer invalidation speedups.

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

Index: third_party/WebKit/Source/platform/graphics/GraphicsLayer.h
diff --git a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.h b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.h
index 11983f37987640ad3af0a5dbc1012bbf102e589d..bf35ccb542d1d8f9db276f5ec1cd21ef7f91edfb 100644
--- a/third_party/WebKit/Source/platform/graphics/GraphicsLayer.h
+++ b/third_party/WebKit/Source/platform/graphics/GraphicsLayer.h
@@ -66,6 +66,12 @@ class WebLayer;
 
 typedef Vector<GraphicsLayer*, 64> GraphicsLayerVector;
 
+struct NeedsDisplayRecord {
+    IntRect r;
+    PaintInvalidationReason invalidationReason;
+    const DisplayItemClient& client;
+};
+
 // GraphicsLayer is an abstraction for a rendering surface with backing store,
 // which may have associated transformation and animations.
 
@@ -182,7 +188,7 @@ public:
 
     void setNeedsDisplay();
     // Mark the given rect (in layer coords) as needing display. Never goes deep.
-    void setNeedsDisplayInRect(const IntRect&, PaintInvalidationReason, const DisplayItemClient&);
+    void setNeedsDisplayInRect(const Vector<NeedsDisplayRecord>& rects);
 
     void setContentsNeedsDisplay();