Enforce constant size and device scale factor for surfaces

cc/surfaces/surface_aggregator_unittest.cc

Index: cc/surfaces/surface_aggregator_unittest.cc
diff --git a/cc/surfaces/surface_aggregator_unittest.cc b/cc/surfaces/surface_aggregator_unittest.cc
index 3892756be4e2a01e4c204c57208474ac7c0f99a1..48e2747448fbd01e06ebb47d81e3b7427ef4a80d 100644
--- a/cc/surfaces/surface_aggregator_unittest.cc
+++ b/cc/surfaces/surface_aggregator_unittest.cc
@@ -1107,8 +1107,6 @@ TEST_F(SurfaceAggregatorValidSurfaceTest, AggregateSharedQuadStateProperties) {
   SurfaceId grandchild_surface_id(grandchild_support->frame_sink_id(),
                                   grandchild_local_surface_id);
 
-  grandchild_support->SubmitCompositorFrame(grandchild_local_surface_id,
-                                            test::MakeCompositorFrame());
   std::unique_ptr<RenderPass> grandchild_pass = RenderPass::Create();
   gfx::Rect output_rect(SurfaceSize());
   gfx::Rect damage_rect(SurfaceSize());
@@ -1123,8 +1121,6 @@ TEST_F(SurfaceAggregatorValidSurfaceTest, AggregateSharedQuadStateProperties) {
   LocalSurfaceId child_one_local_surface_id = allocator_.GenerateId();
   SurfaceId child_one_surface_id(child_one_support->frame_sink_id(),
                                  child_one_local_surface_id);
-  child_one_support->SubmitCompositorFrame(child_one_local_surface_id,
-                                           test::MakeCompositorFrame());
 
   std::unique_ptr<RenderPass> child_one_pass = RenderPass::Create();
   child_one_pass->SetNew(pass_id, output_rect, damage_rect,
@@ -1145,8 +1141,6 @@ TEST_F(SurfaceAggregatorValidSurfaceTest, AggregateSharedQuadStateProperties) {
   LocalSurfaceId child_two_local_surface_id = allocator_.GenerateId();
   SurfaceId child_two_surface_id(child_two_support->frame_sink_id(),
                                  child_two_local_surface_id);
-  child_two_support->SubmitCompositorFrame(child_two_local_surface_id,
-                                           test::MakeCompositorFrame());
 
   std::unique_ptr<RenderPass> child_two_pass = RenderPass::Create();
   child_two_pass->SetNew(pass_id, output_rect, damage_rect,