Don't send the renderer flags that it doesn't use.

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 8ce3104caa521368e8b67a5e7b86fecbd640121f..9acd9ec5d88c805c941f6475fc7df17003bda8b1 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -634,20 +634,12 @@ void GpuDataManagerImplPrivate::AppendRendererCommandLine(
   DCHECK(command_line);
 
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_WEBGL)) {
-    if (!command_line->HasSwitch(switches::kDisableExperimentalWebGL))
-      command_line->AppendSwitch(switches::kDisableExperimentalWebGL);
     if (!command_line->HasSwitch(switches::kDisablePepper3d))
       command_line->AppendSwitch(switches::kDisablePepper3d);
   }
-  if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_MULTISAMPLING) &&
-      !command_line->HasSwitch(switches::kDisableGLMultisampling))
-    command_line->AppendSwitch(switches::kDisableGLMultisampling);
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING) &&
       !command_line->HasSwitch(switches::kDisableAcceleratedCompositing))
     command_line->AppendSwitch(switches::kDisableAcceleratedCompositing);
-  if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_2D_CANVAS) &&
-      !command_line->HasSwitch(switches::kDisableAccelerated2dCanvas))
-    command_line->AppendSwitch(switches::kDisableAccelerated2dCanvas);
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_VIDEO_DECODE) &&
       !command_line->HasSwitch(switches::kDisableAcceleratedVideoDecode))
     command_line->AppendSwitch(switches::kDisableAcceleratedVideoDecode);