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

content/browser/gpu/gpu_data_manager_impl_private.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/gpu/gpu_data_manager_impl_private.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
@@ skipping 756 matching lines @@
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_FLASH3D))
     prefs->flash_3d_enabled = false;
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_FLASH_STAGE3D)) {
     prefs->flash_stage3d_enabled = false;
     prefs->flash_stage3d_baseline_enabled = false;
   }
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_FLASH_STAGE3D_BASELINE))
     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()) {
     prefs->accelerated_2d_canvas_enabled = false;
     prefs->pepper_3d_enabled = false;
   }
 #endif
 
   const base::CommandLine* command_line =
       base::CommandLine::ForCurrentProcess();
@@ skipping 447 matching lines @@
   gpu_info_.context_info_state = gpu::kCollectInfoFatalFailure;
 #if defined(OS_WIN)
   gpu_info_.dx_diagnostics_info_state = gpu::kCollectInfoFatalFailure;
 #endif
   complete_gpu_info_already_requested_ = true;
   // Some observers might be waiting.
   NotifyGpuInfoUpdate();
 }
 
 }  // namespace content