Expose public interface for composited selection bounds

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 03a17e4291a42a38a598eb6315447ce66eea4a2f..cbece100b227ca4ed85b426580d5ebc285fab93d 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -123,6 +123,7 @@
 #include "public/web/WebPlugin.h"
 #include "public/web/WebPluginAction.h"
 #include "public/web/WebRange.h"
+#include "public/web/WebSelectionBound.h"
 #include "public/web/WebTextInputInfo.h"
 #include "public/web/WebViewClient.h"
 #include "public/web/WebWindowFeatures.h"
@@ -1802,6 +1803,18 @@ void WebViewImpl::exitFullScreenForElement(WebCore::Element* element)
     m_fullscreenController->exitFullScreenForElement(element);
 }
 
+void WebViewImpl::clearCompositedSelectionBounds()
+{
+    if (m_layerTreeView)
+        m_layerTreeView->clearSelection();
+}
+
+void WebViewImpl::updateCompositedSelectionBounds(const WebSelectionBound& anchor, const WebSelectionBound& focus)
+{
+    if (m_layerTreeView)
+        m_layerTreeView->registerSelection(anchor, focus);
+}
+
 bool WebViewImpl::hasHorizontalScrollbar()
 {
     return mainFrameImpl()->frameView()->horizontalScrollbar();
@@ -3908,7 +3921,7 @@ void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
             ASSERT(m_layerTreeView);
             // In threaded compositing mode, force compositing mode is always on so setIsAcceleratedCompositingActive(false)
             // means that we're transitioning to a new page. Suppress commits until WebKit generates invalidations so
-            // we don't attempt to paint too early in the next page load.
+
             m_layerTreeView->setDeferCommits(true);
             m_layerTreeViewCommitsDeferred = true;
         }