Fix DrawQuad copy

cc/render_pass_draw_quad.cc

Index: cc/render_pass_draw_quad.cc
diff --git a/cc/render_pass_draw_quad.cc b/cc/render_pass_draw_quad.cc
index 6780caa6b8776a2c946bd78aaf8e5899c134b05a..37ed51ef0d9cd6d065e6fcf344b4cbcf9b26d36a 100644
--- a/cc/render_pass_draw_quad.cc
+++ b/cc/render_pass_draw_quad.cc
@@ -36,14 +36,9 @@ const RenderPassDrawQuad* RenderPassDrawQuad::materialCast(const DrawQuad* quad)
 
 scoped_ptr<RenderPassDrawQuad> RenderPassDrawQuad::copy(const SharedQuadState* copiedSharedQuadState, RenderPass::Id copiedRenderPassId) const
 {
-    unsigned bytes = size();
-    DCHECK(bytes > 0);
-
-    scoped_ptr<RenderPassDrawQuad> copyQuad(reinterpret_cast<RenderPassDrawQuad*>(new char[bytes]));
-    memcpy(copyQuad.get(), this, bytes);
+    scoped_ptr<RenderPassDrawQuad> copyQuad(new RenderPassDrawQuad(*materialCast(this)));
     copyQuad->setSharedQuadState(copiedSharedQuadState);
     copyQuad->m_renderPassId = copiedRenderPassId;
-
     return copyQuad.Pass();
 }