macOS/ARM: Use cc_unittests ARM64 tolerance on macOS too

There exist separate tolerances for desktop ARM64 (Windows and Fuchsia)
already. They are needed for macOS as well.

Bug: 1128443
Change-Id: I93b14ea6acf26c1d1aea6748134988690fa9990f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2424712Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Commit-Queue: ccameron <ccameron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809567}

cc/trees/layer_tree_host_pixeltest_filters.cc

@@ -817,10 +817,10 @@ TEST_P(LayerTreeHostFiltersPixelTest, RotatedFilter) {
 
   background->AddChild(child);
 
-#if defined(OS_WIN) || defined(OS_FUCHSIA)
-#if defined (ARCH_CPU_ARM64)
-  // Windows ARM64 and Fuchsia has some pixels difference
-  // crbug.com/1029728, crbug.com/1048249
+#if defined(OS_WIN) || defined(OS_FUCHSIA) || defined(OS_MAC)
+#if defined(ARCH_CPU_ARM64)
+  // Windows, macOS, and Fuchsia on ARM64 has some pixels difference
+  // crbug.com/1029728, crbug.com/1048249, crbug.com/1128443
   float percentage_pixels_large_error = 0.391112f;
   float average_error_allowed_in_bad_pixels = 1.1f;
   int large_error_allowed = 3;
@@ -879,13 +879,15 @@ TEST_P(LayerTreeHostFiltersPixelTest, RotatedDropShadowFilter) {
   background->AddChild(child);
 
 #if defined(OS_WIN) || defined(ARCH_CPU_ARM64)
-#if (defined(OS_WIN) && defined(ARCH_CPU_ARM64)) || defined(OS_FUCHSIA)
-  // Windows ARM64 has some pixels difference: crbug.com/1029729
+#if defined(ARCH_CPU_ARM64) && \
+    (defined(OS_WIN) || defined(OS_FUCHSIA) || defined(OS_MAC))
+  // Windows, macOS, and Fuchsia on ARM64 has some pixels difference.
+  // crbug.com/1029728, crbug.com/1128443
   float percentage_pixels_large_error = 0.89f;
   float average_error_allowed_in_bad_pixels = 5.f;
   int large_error_allowed = 17;
 #else
-  // Windows and ARM64 have 3 pixels off by 1: crbug.com/259915
+  // Windows and all other ARM64 have 3 pixels off by 1: crbug.com/259915
   float percentage_pixels_large_error = 0.00333334f;  // 3px / (300*300)
   float average_error_allowed_in_bad_pixels = 1.f;
   int large_error_allowed = 1;

cc/trees/layer_tree_host_pixeltest_masks.cc

@@ -774,10 +774,10 @@ class LayerTreeHostMaskAsBlendingPixelTest
       small_error_allowed = 1;
     } else {
 #if defined(ARCH_CPU_ARM64)
-#if defined(OS_WIN) || defined(OS_FUCHSIA)
-      // Windows and Fuchsia ARM64 has some pixels difference
+#if defined(OS_WIN) || defined(OS_FUCHSIA) || defined(OS_MAC)
+      // ARM Windows, macOS, and Fuchsia has some pixels difference
       // Affected tests: RotatedClippedCircle, RotatedClippedCircleUnderflow
-      // crbug.com/1030244, crbug.com/1048249
+      // crbug.com/1030244, crbug.com/1048249, crbug.com/1128443
       percentage_pixels_error = 6.1f;
       average_error_allowed_in_bad_pixels = 5.f;
       large_error_allowed = 20;