frame_view: remove compiler workaround

The intended fix for this is https://reviews.llvm.org/D77421, which is
now a part of both the CrOS and Chromium toolchains. Removing this
should now be safe.

Bug: 1062006
Change-Id: I1557aa18898966c14aafd53b64027e61b0afb5e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2267452Reviewed-by: Stefan Zager <szager@chromium.org>
Commit-Queue: George Burgess <gbiv@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782711}

third_party/blink/renderer/core/frame/frame_view.h

@@ -16,11 +16,7 @@ namespace blink {
 class Frame;
 struct IntrinsicSizingInfo;
 
-// clang::lto_visibility_public is necessary to prevent the compiler from
-// performing a vtable optimization that crashes the renderer. See
-// crbug.com/1062006.
-class CORE_EXPORT [[clang::lto_visibility_public]] FrameView
-    : public EmbeddedContentView {
+class CORE_EXPORT FrameView : public EmbeddedContentView {
  public:
   FrameView(const IntRect& frame_rect) : EmbeddedContentView(frame_rect) {}
   ~FrameView() override = default;