cc: Use gfx:: Geometry types for positions, bounds, and related things.

cc/layer_quad.h

Index: cc/layer_quad.h
diff --git a/cc/layer_quad.h b/cc/layer_quad.h
index 9f4dfcf97e24ab8e23a4625cced154ae08f568dc..3046c14fb38c573f6c5a9483ef2341ddaaade9eb 100644
--- a/cc/layer_quad.h
+++ b/cc/layer_quad.h
@@ -23,7 +23,7 @@ public:
             , m_z(0)
         {
         }
-        Edge(const FloatPoint&, const FloatPoint&);
+        Edge(const gfx::PointF&, const gfx::PointF&);
 
         float x() const { return m_x; }
         float y() const { return m_y; }
@@ -60,9 +60,9 @@ public:
         }
         void scale(float s) { scale(s, s, s); }
 
-        FloatPoint intersect(const Edge& e) const
+        gfx::PointF intersect(const Edge& e) const
         {
-            return FloatPoint(
+            return gfx::PointF(
                 (y() * e.z() - e.y() * z()) / (x() * e.y() - e.x() * y()),
                 (x() * e.z() - e.x() * z()) / (e.x() * y() - x() * e.y()));
         }