(WIP) Invalidation during painting (for synchronized painting)

third_party/WebKit/Source/platform/graphics/paint/PaintController.h

Index: third_party/WebKit/Source/platform/graphics/paint/PaintController.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/PaintController.h b/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
index fab3dbc0d5ac2fe7f2cf90f625a513b3f589e50c..30611e73a316e67495f8974141bb7d9e117b723d 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
@@ -43,7 +43,7 @@ public:
 
     // These methods are called during paint invalidation (or paint if SlimmingPaintV2 is on).
 
-    void invalidate(const DisplayItemClient&);
+    void invalidate(const DisplayItemClient&, PaintInvalidationReason, const IntRect& previousPaintInvalidationRect, const IntRect& newPaintInvalidationRect);
     void invalidateUntracked(const DisplayItemClient&);
     void invalidateAll();
 
@@ -264,10 +264,17 @@ private:
     unsigned m_nextScope;
     Vector<unsigned> m_scopeStack;
 
-#if ENABLE(ASSERT)
+    struct Invalidation {
+        DisplayItemClient client;
+        String debugName;
+        IntRect rect;
+        PaintInvalidationReason invalidationReason;
+    };
+
     // Record the debug names of invalidated clients for assertion and debugging.
-    Vector<String> m_invalidations;
+    Vector<Invalidation> m_invalidations;
 
+#if ENABLE(ASSERT)
     // This is used to check duplicated ids during add(). We could also check
     // during commitNewDisplayItems(), but checking during add() helps developer
     // easily find where the duplicated ids are from.
@@ -275,6 +282,8 @@ private:
 #endif
 
     OwnPtr<Vector<String>> m_trackedPaintInvalidationObjects;
+public:
+    String m_debugName;
 };
 
 } // namespace blink