assistant: Not clip corner for web container

For Assistant web container, we do not need to clip the contents corners.

Bug: b/144047917
Test: manual
Change-Id: I865bb375c52faee3b5cda708b48b137aa07452ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1902715
Commit-Queue: Tao Wu <wutao@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713674}

ash/assistant/ui/assistant_web_view.cc

@@ -176,9 +176,11 @@ void AssistantWebView::DidStopLoading() {
   SetFocusBehavior(FocusBehavior::ALWAYS);
 
   // We need to clip the corners of our web contents to match our container.
-  contents_->GetView()->native_view()->layer()->SetRoundedCornerRadius(
-      {/*top_left=*/0, /*top_right=*/0, /*bottom_right=*/kCornerRadiusDip,
-       /*bottom_left=*/kCornerRadiusDip});
+  if (!chromeos::assistant::features::IsAssistantWebContainerEnabled()) {
+    contents_->GetView()->native_view()->layer()->SetRoundedCornerRadius(
+        {/*top_left=*/0, /*top_right=*/0, /*bottom_right=*/kCornerRadiusDip,
+         /*bottom_left=*/kCornerRadiusDip});
+  }
 }
 
 void AssistantWebView::DidSuppressNavigation(const GURL& url,