Enable GPU Rasterization by default on Mac

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index bcb2caa47041a95eed4d71155218f38bddbb52a2..e8edd90a5a2c1ef64b4604e6eff0a48ba120ace8 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -36,8 +36,14 @@ const base::Feature kCredentialManagementAPI{"CredentialManagementAPI",
 
 // Enable GPU Rasterization by default. This can still be overridden by
 // --force-gpu-rasterization or --disable-gpu-rasterization.
+#if defined(OS_ANDROID) || defined(OS_MACOSX)
+// DefaultEnableGpuRasterization has launched on Android and Mac.
+const base::Feature kDefaultEnableGpuRasterization{
+    "DefaultEnableGpuRasterization", base::FEATURE_ENABLED_BY_DEFAULT};
+#else
 const base::Feature kDefaultEnableGpuRasterization{
     "DefaultEnableGpuRasterization", base::FEATURE_DISABLED_BY_DEFAULT};
+#endif
 
 // Speculatively pre-evaluate Javascript which will likely use document.write to
 // load an external script. The feature extracts the written markup and sends it