Change the scale factor of texture_size from the layer's one to an estimation.

ui/aura/bench/bench_main.cc

Index: ui/aura/bench/bench_main.cc
diff --git a/ui/aura/bench/bench_main.cc b/ui/aura/bench/bench_main.cc
index bcb03e7ffd0863889a976da913d0145913233de3..e187d45f1c6376ce9e87a1e46b2e9a3b1527e0fa 100644
--- a/ui/aura/bench/bench_main.cc
+++ b/ui/aura/bench/bench_main.cc
@@ -134,7 +134,7 @@ class BenchCompositorObserver : public ui::CompositorObserver {
 class WebGLTexture : public ui::Texture {
  public:
   WebGLTexture(WebGraphicsContext3D* context, const gfx::Size& size)
-      : ui::Texture(false, size),
+      : ui::Texture(false, size, 1.0f),
         context_(context) {
     set_texture_id(context_->createTexture());
     context_->bindTexture(GL_TEXTURE_2D, texture_id());