Remove EnableThreadedCompositing from the browser.

content/browser/resources/gpu/info_view.js

Index: content/browser/resources/gpu/info_view.js
diff --git a/content/browser/resources/gpu/info_view.js b/content/browser/resources/gpu/info_view.js
index 2dbe5a174b26e720b276be6f8e6d67583452177d..39042cadbeffb7c44e8501278a3a31664723e07b 100644
--- a/content/browser/resources/gpu/info_view.js
+++ b/content/browser/resources/gpu/info_view.js
@@ -101,10 +101,6 @@ cr.define('gpu', function() {
           'label': 'Software only. Hardware acceleration disabled',
           'class': 'feature-yellow'
         },
-        'disabled_software_threaded': {
-          'label': 'Software only, threaded. Hardware acceleration disabled',
-          'class': 'feature-yellow'
-        },
         'disabled_off': {
           'label': 'Disabled',
           'class': 'feature-red'
@@ -117,10 +113,6 @@ cr.define('gpu', function() {
           'label': 'Software only, hardware acceleration unavailable',
           'class': 'feature-yellow'
         },
-        'unavailable_software_threaded': {
-          'label': 'Software only, threaded. Hardware acceleration unavailable',
-          'class': 'feature-yellow'
-        },
         'unavailable_off': {
           'label': 'Unavailable',
           'class': 'feature-red'
@@ -137,10 +129,6 @@ cr.define('gpu', function() {
           'label': 'Hardware accelerated on all pages',
           'class': 'feature-green'
         },
-        'enabled_threaded': {
-          'label': 'Hardware accelerated and threaded',
-          'class': 'feature-green'
-        },
         'enabled': {
           'label': 'Hardware accelerated',
           'class': 'feature-green'