(WIP) Invalidation during painting (for synchronized painting)

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PaintController_h
 #define PaintController_h
 
 #include "platform/PlatformExport.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/geometry/IntRect.h"
@@ skipping 25 matching lines @@
     WTF_MAKE_NONCOPYABLE(PaintController);
     USING_FAST_MALLOC(PaintController);
 public:
     static PassOwnPtr<PaintController> create()
     {
         return adoptPtr(new PaintController());
     }
 
     // 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();
 
     // Record when paint offsets change during paint.
     void invalidatePaintOffset(const DisplayItemClient&);
 #if ENABLE(ASSERT)
     bool paintOffsetWasInvalidated(const DisplayItemClient&) const;
 #endif
 
     // These methods are called during painting.
@@ skipping 200 matching lines @@
     bool m_textPainted;
     bool m_imagePainted;
 
     int m_skippingCacheCount;
 
     int m_numCachedNewItems;
 
     unsigned m_nextScope;
     Vector<unsigned> m_scopeStack;
 
+    struct Invalidation {
+        DisplayItemClient client;
+        String debugName;
+        IntRect rect;
+        PaintInvalidationReason invalidationReason;
+    };
+
+    // Record the debug names of invalidated clients for assertion and debugging.
+    Vector<Invalidation> m_invalidations;
+
 #if ENABLE(ASSERT)
-    // Record the debug names of invalidated clients for assertion and debugging.
-    Vector<String> m_invalidations;
-
     // 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.
     DisplayItemIndicesByClientMap m_newDisplayItemIndicesByClient;
 #endif
 
     OwnPtr<Vector<String>> m_trackedPaintInvalidationObjects;
+public:
+    String m_debugName;
 };
 
 } // namespace blink
 
 #endif // PaintController_h