Remove the MSAA WebSetting, which is not read or used.

content/browser/gpu/gpu_data_manager_impl_private.cc

Index: content/browser/gpu/gpu_data_manager_impl_private.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl_private.cc b/content/browser/gpu/gpu_data_manager_impl_private.cc
index fd3b22531ee873eb498a649c44f6153b58cf9eca..0f5c572dc9b2dce5202adc405a88901239f50306 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -774,16 +774,6 @@ void GpuDataManagerImplPrivate::UpdateRendererWebPrefs(
     prefs->flash_stage3d_baseline_enabled = false;
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS))
     prefs->accelerated_2d_canvas_enabled = false;
-  // TODO(senorblanco): The renderer shouldn't have an extra setting
-  // for this, but should rely on extension availability.
-  // Note that |gl_multisampling_enabled| only affects the decoder's
-  // default framebuffer allocation, which does not support
-  // multisampled_render_to_texture, only msaa with explicit resolve.
-  if (IsDriverBugWorkaroundActive(
-          gpu::DISABLE_CHROMIUM_FRAMEBUFFER_MULTISAMPLE) ||
-      (IsDriverBugWorkaroundActive(gpu::DISABLE_MULTIMONITOR_MULTISAMPLING) &&
-       display_count_ > 1))
-    prefs->gl_multisampling_enabled = false;
 
 #if defined(USE_AURA)
   if (!CanUseGpuBrowserCompositor()) {