Switch from CommandLine switch to WebPreferences to control Pepper 3D.

content/browser/renderer_host/render_view_host_impl.cc

 // Copyright (c) 2012 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/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 345 matching lines @@
 #else
   prefs.webaudio_enabled =
       !command_line.HasSwitch(switches::kDisableWebAudio);
 #endif
 
   prefs.experimental_webgl_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisable3DAPIs) &&
       !command_line.HasSwitch(switches::kDisableExperimentalWebGL);
 
+  prefs.pepper_3d_enabled =
+      !command_line.HasSwitch(switches::kDisablePepper3d);
+
   prefs.flash_3d_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisableFlash3d);
   prefs.flash_stage3d_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisableFlashStage3d);
   prefs.flash_stage3d_baseline_enabled =
       GpuProcessHost::gpu_enabled() &&
       !command_line.HasSwitch(switches::kDisableFlashStage3d);
 
@@ skipping 1903 matching lines @@
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
   if (main_frame_id() != FrameTreeNode::kInvalidFrameId) {
     frame_tree->OnFirstNavigationAfterSwap(main_frame_id());
   }
 }
 
 }  // namespace content