Update scaling of video layers on every swap.

gpu/ipc/service/direct_composition_surface_win_unittest.cc

Index: gpu/ipc/service/direct_composition_surface_win_unittest.cc
diff --git a/gpu/ipc/service/direct_composition_surface_win_unittest.cc b/gpu/ipc/service/direct_composition_surface_win_unittest.cc
index b1aa306f8177fadb0284f1d8d493850fb6fa5c3e..62d9cb52bc3d98891e5901e61fdb65f775c3a99f 100644
--- a/gpu/ipc/service/direct_composition_surface_win_unittest.cc
+++ b/gpu/ipc/service/direct_composition_surface_win_unittest.cc
@@ -502,11 +502,22 @@ TEST_F(DirectCompositionPixelTest, VideoSwapchain) {
   ui::DCRendererLayerParams params(
       false, gfx::Rect(), 1, gfx::Transform(),
       std::vector<scoped_refptr<gl::GLImage>>{image_dxgi},
-      gfx::RectF(gfx::Rect(texture_size)), gfx::Rect(window_size), 0, 0, 1.0,
+      gfx::RectF(gfx::Rect(texture_size)), gfx::Rect(texture_size), 0, 0, 1.0,
       0);
   surface_->ScheduleDCLayer(params);
 
   EXPECT_EQ(gfx::SwapResult::SWAP_ACK, surface_->SwapBuffers());
+
+  // Scaling up the swapchain with the same image should cause it to be
+  // transformed again, but not presented again.
+  ui::DCRendererLayerParams params2(
+      false, gfx::Rect(), 1, gfx::Transform(),
+      std::vector<scoped_refptr<gl::GLImage>>{image_dxgi},
+      gfx::RectF(gfx::Rect(texture_size)), gfx::Rect(window_size), 0, 0, 1.0,
+      0);
+  surface_->ScheduleDCLayer(params2);
+
+  EXPECT_EQ(gfx::SwapResult::SWAP_ACK, surface_->SwapBuffers());
   Sleep(1000);
 
   SkColor expected_color = SkColorSetRGB(0xff, 0xb7, 0xff);