slim: Implement rounded corner

The implementation is not entirely based on cc as cc's implementation
has bugs.

The RRectF (in MaskFilterInfo) is on the SharedQuadState is in target
space. Setting a non-empty rounded corner also clips the subtree to the
layer; this is implemented exactly as if MaskToBounds is set.

There are 2 cases where a new render pass is needed:
* The layer is not axis aligned. For similar reason as clip, RRectF
  stores an axis aligned rect. There is no special handling added since
  MaskToBounds implementation already creates new pass for this case.
* Parent layer already has a rounded corner. In this case, the child
  layer is draw to the new pass with its rounded corner, and the
  RenderPassDrawQuad draws with the parent rounded corner.

Observed difference from cc:
* Slim always sets fast rounded corner.
* Slim supports rotating rounded corner. cc appears to just break
  rounded corner with rotation.
* No need to create new pass if there is only one (axis-aligned)
  rounded corner layer on the path to root. Any number of children of
  the that layer can use the same RRectF (in MaskFilterInfo), since it
  is target space. There is no need for additional render pass.

Bug: 1399283
Change-Id: I24a31c6424c1108b7da92edf2ec26a8f72d2315b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4457397
Commit-Queue: Bo Liu <boliu@chromium.org>
Reviewed-by: Kyle Charbonneau <kylechar@chromium.org>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1135574}

• cc/slim/frame_data.h[diff]
• cc/slim/layer.cc[diff]
• cc/slim/layer.h[diff]
• cc/slim/layer_tree_impl.cc[diff]
• cc/slim/nine_patch_layer.cc[diff]
• cc/slim/slim_layer_tree_compositor_frame_unittest.cc[diff]
• cc/slim/slim_layer_unittest.cc[diff]
• cc/slim/solid_color_layer.cc[diff]
• cc/slim/surface_layer.cc[diff]
• cc/slim/ui_resource_layer.cc[diff]