Cleanup the RespectMacLCDTextSetting experiment

This has fully launched and the experiment can be removed.

Bug: 1079418
Change-Id: Ic06e85939829cce8ecf80fb0692b0b0d5e0595ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2613129Reviewed-by: Charlie Reis <creis@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841072}

content/public/common/content_features.cc

@@ -558,11 +558,6 @@ const base::Feature kRenderDocument{"RenderDocument",
 const base::Feature kSkipEarlyCommitPendingForCrashedFrame{
     "SkipEarlyCommitPendingForCrashedFrame", base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Respect the MacOS system setting for subpixel text anti-aliasing.
-// https://crbug.com/1079418.
-const base::Feature kRespectMacLCDTextSetting{"RespectMacLCDTextSetting",
-                                              base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Run video capture service in the Browser process as opposed to a dedicated
 // utility process
 const base::Feature kRunVideoCaptureServiceInBrowserProcess{

content/public/common/content_features.h

@@ -132,7 +132,6 @@ CONTENT_EXPORT extern const base::Feature kPushSubscriptionChangeEvent;
 CONTENT_EXPORT extern const base::Feature kDirectSockets;
 CONTENT_EXPORT extern const base::Feature kReloadHiddenTabsWithCrashedSubframes;
 CONTENT_EXPORT extern const base::Feature kRenderDocument;
-CONTENT_EXPORT extern const base::Feature kRespectMacLCDTextSetting;
 CONTENT_EXPORT extern const base::Feature
     kRunVideoCaptureServiceInBrowserProcess;
 CONTENT_EXPORT extern const base::Feature kSavePageAsWebBundle;

content/renderer/render_thread_impl.cc

@@ -655,10 +655,7 @@ void RenderThreadImpl::Init() {
 #if defined(OS_ANDROID)
     is_lcd_text_enabled_ = false;
 #elif defined(OS_MAC)
-    if (base::FeatureList::IsEnabled(features::kRespectMacLCDTextSetting))
-      is_lcd_text_enabled_ = IsSubpixelAntialiasingAvailable();
-    else
-      is_lcd_text_enabled_ = true;
+    is_lcd_text_enabled_ = IsSubpixelAntialiasingAvailable();
 #else
     is_lcd_text_enabled_ = true;
 #endif

testing/variations/fieldtrial_testing_config.json

@@ -6425,21 +6425,6 @@
             ]
         }
     ],
-    "RespectMacLCDTextSetting": [
-        {
-            "platforms": [
-                "mac"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "RespectMacLCDTextSetting"
-                    ]
-                }
-            ]
-        }
-    ],
     "RevampedContextMenu": [
         {
             "platforms": [