Route selection bounds updates through WebLayerTreeView

Source/core/editing/RenderedPosition.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/editing/RenderedPosition.h"
 
 #include "core/dom/Position.h"
 #include "core/editing/VisiblePosition.h"
+#include "core/rendering/RenderLayer.h"
+#include "core/rendering/compositing/CompositedSelectionBound.h"
 
 namespace blink {
 
 static inline RenderObject* rendererFromPosition(const Position& position)
 {
     ASSERT(position.isNotNull());
     Node* rendererNode = 0;
     switch (position.anchorType()) {
     case Position::PositionIsOffsetInAnchor:
         rendererNode = position.computeNodeAfterPosition();
@@ skipping 178 matching lines @@
 
 IntRect RenderedPosition::absoluteRect(LayoutUnit* extraWidthToEndOfLine) const
 {
     if (isNull())
         return IntRect();
 
     IntRect localRect = pixelSnappedIntRect(m_renderer->localCaretRect(m_inlineBox, m_offset, extraWidthToEndOfLine));
     return localRect == IntRect() ? IntRect() : m_renderer->localToAbsoluteQuad(FloatRect(localRect)).enclosingBoundingBox();
 }
 
+void RenderedPosition::positionInGraphicsLayerBacking(CompositedSelectionBound& bound) const
+{
+    bound.layer = nullptr;
+    bound.edgeTopInLayer = bound.edgeBottomInLayer = FloatPoint();
+
+    if (isNull())
+        return;
+
+    LayoutRect rect = m_renderer->localCaretRect(m_inlineBox, m_offset);
+    if (rect == LayoutRect())
+        return;
+
+    RenderLayer* layer;
+    bound.edgeTopInLayer = m_renderer->localToInvalidationBackingPoint(rect.minXMinYCorner(), &layer);
+    bound.edgeBottomInLayer = m_renderer->localToInvalidationBackingPoint(rect.minXMaxYCorner(), nullptr);
+    bound.layer = layer->graphicsLayerBacking();
+}
+
 bool renderObjectContainsPosition(RenderObject* target, const Position& position)
 {
     for (RenderObject* renderer = rendererFromPosition(position); renderer && renderer->node(); renderer = renderer->parent()) {
         if (renderer == target)
             return true;
     }
     return false;
 }
 
 };