Mark some non-spinvalidation methods deprecated, and update paint/README.md

third_party/WebKit/Source/core/layout/api/LayoutItem.h

 // Copyright 2016 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 LayoutItem_h
 #define LayoutItem_h
 
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/layout/LayoutObject.h"
 
@@ skipping 183 matching lines @@
   }
 
   void HandleSubtreeModifications() {
     layout_object_->HandleSubtreeModifications();
   }
 
   bool NeedsOverflowRecalcAfterStyleChange() const {
     return layout_object_->NeedsOverflowRecalcAfterStyleChange();
   }
 
-  void InvalidateTreeIfNeeded(const PaintInvalidationState& state) {
-    layout_object_->InvalidateTreeIfNeeded(state);
+  void DeprecatedInvalidateTree(const PaintInvalidationState& state) {
+    layout_object_->DeprecatedInvalidateTree(state);
   }
 
   CompositingState GetCompositingState() const {
     return layout_object_->GetCompositingState();
   }
 
   bool MapToVisualRectInAncestorSpace(
       const LayoutBoxModelObject* ancestor,
       LayoutRect& layout_rect,
       VisualRectFlags flags = kDefaultVisualRectFlags) const {
@@ skipping 26 matching lines @@
 
  private:
   LayoutObject* layout_object_;
 
   friend class LayoutAPIShim;
 };
 
 }  // namespace blink
 
 #endif  // LayoutItem_h