Route selection bounds updates through WebLayerTreeView

Source/core/rendering/compositing/CompositedSelectionBound.h

Index: Source/core/rendering/compositing/CompositedSelectionBound.h
diff --git a/Source/web/tests/FloatPointTestHelpers.h b/Source/core/rendering/compositing/CompositedSelectionBound.h
similarity index 68%
copy from Source/web/tests/FloatPointTestHelpers.h
copy to Source/core/rendering/compositing/CompositedSelectionBound.h
index 2ef2ee07fe3bb2d7ae60416992c8039769a93d72..d9cc88a412fa983f32f4f8a587f8d281ceafb718 100644
--- a/Source/web/tests/FloatPointTestHelpers.h
+++ b/Source/core/rendering/compositing/CompositedSelectionBound.h
@@ -27,24 +27,38 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-#ifndef FloatPointTestHelpers_h
-#define FloatPointTestHelpers_h
 
-#include "platform/geometry/FloatPoint.h"
+#ifndef CompositedSelectionBound_h
+#define CompositedSelectionBound_h
 
-#include <gtest/gtest.h>
+#include "platform/geometry/FloatPoint.h"
+#include "platform/graphics/GraphicsLayer.h"
 
-// Gtest will automatically pick up this function if included to print out
-// FloatPoints, rather than just spitting out their memory.
 namespace blink {
-inline void PrintTo(const FloatPoint& point, ::std::ostream* os)
-{
-    *os << "FloatPoint("
-        << std::fixed
-        << std::setprecision(4) << point.x() << "f, "
-        << std::setprecision(4) << point.y() << "f)";
-    os->unsetf(std::ios::floatfield);
-}
-}
-
-#endif // FloatPointTestHelpers_h
+
+struct CompositedSelectionBound {
+    enum Type {
+        Caret,
+        SelectionLeft,
+        SelectionRight
+    };
+
+    CompositedSelectionBound()
+        : type(Caret)
+        , layer(nullptr)
+    {
+    }
+
+    Type type;
+
+    // The structure describes the position of a caret in space of the GraphicsLayer the caret resides in.
+    // Where edgeTopInLayer is the top point of the caret, usually on the ascend line of the line box,
+    // and edgeBottomInLayer it the bottom point, on the baseline of the line box.
+    GraphicsLayer* layer;
+    FloatPoint edgeTopInLayer;
+    FloatPoint edgeBottomInLayer;
+};
+
+} // namespace blink
+
+#endif