Increase error tolerance in PreserveNearIntegralBounds() again

If a layer has an offset from integral location < 1e-3, the
antialiased pixels on the edge of the layer is invisible, so we
can safely remove such offsets. Same for size.

Bug: 1462054
Change-Id: I4608ec95cc8efe91ec5dc197203f72d4cd75937f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4892513
Auto-Submit: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1201240}

third_party/blink/renderer/platform/graphics/compositing/pending_layer.cc

@@ -25,7 +25,7 @@ namespace {
 
 // Snap |bounds| if within floating-point numeric limits of an integral rect.
 void PreserveNearIntegralBounds(gfx::RectF& bounds) {
-  constexpr float kTolerance = 1e-4f;
+  constexpr float kTolerance = 1e-3f;
   if (std::abs(std::round(bounds.x()) - bounds.x()) <= kTolerance &&
       std::abs(std::round(bounds.y()) - bounds.y()) <= kTolerance &&
       std::abs(std::round(bounds.right()) - bounds.right()) <= kTolerance &&