Fix caret invalidation in slimmingPaintInvalidation path

third_party/WebKit/Source/core/paint/BlockPaintInvalidator.cpp

Index: third_party/WebKit/Source/core/paint/BlockPaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/BlockPaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/BlockPaintInvalidator.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..081996977e2bdd332cd20044ae515ce5d5bec1e7
--- /dev/null
+++ b/third_party/WebKit/Source/core/paint/BlockPaintInvalidator.cpp
@@ -0,0 +1,27 @@
+// 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.
+
+#include "core/paint/BlockPaintInvalidator.h"
+
+#include "core/editing/FrameSelection.h"
+#include "core/frame/LocalFrame.h"
+#include "core/layout/LayoutBlock.h"
+#include "core/paint/BoxPaintInvalidator.h"
+#include "core/paint/PaintInvalidator.h"
+
+namespace blink {
+
+PaintInvalidationReason BlockPaintInvalidator::invalidatePaintIfNeeded()
+{
+    PaintInvalidationReason reason = BoxPaintInvalidator(m_block, m_context).invalidatePaintIfNeeded();
+
+    if (reason != PaintInvalidationNone && m_block.hasCaret()) {
+        FrameSelection& selection = m_block.frame()->selection();
+        selection.setCaretRectNeedsUpdate();
+        selection.invalidateCaretRect(true);
+    }
+    return reason;
+}
+
+}