Disable GPU features if /dev/nvidiactl is inaccessible

content/browser/gpu/gpu_data_manager_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/gpu/gpu_data_manager_impl.h"
 
 #if defined(OS_MACOSX)
 #include <CoreGraphics/CGDisplayConfiguration.h>
 #endif
 
@@ skipping 143 matching lines @@
     return flags;
   }
 
   return gpu_feature_type_;
 }
 
 bool GpuDataManagerImpl::GpuAccessAllowed() {
   if (software_rendering_)
     return true;
 
+  if (!gpu_info_.gpu_accessible)
+    return false;
+
   // We only need to block GPU process if more features are disallowed other
   // than those in the preliminary gpu feature flags because the latter work
   // through renderer commandline switches.
   uint32 mask = ~(preliminary_gpu_feature_type_);
   return (gpu_feature_type_ & mask) == 0;
 }
 
 void GpuDataManagerImpl::AddObserver(GpuDataManagerObserver* observer) {
   observer_list_->AddObserver(observer);
 }
@@ skipping 199 matching lines @@
     if (object->gl_renderer.empty()) {
       changed |= object->gl_renderer != other.gl_renderer;
       object->gl_renderer = other.gl_renderer;
     }
     if (object->gl_extensions.empty()) {
       changed |= object->gl_extensions != other.gl_extensions;
       object->gl_extensions = other.gl_extensions;
     }
     object->can_lose_context = other.can_lose_context;
     object->software_rendering = other.software_rendering;
+    object->gpu_accessible = other.gpu_accessible;
 #if defined(OS_WIN)
     if (object->dx_diagnostics.values.size() == 0 &&
         object->dx_diagnostics.children.size() == 0) {
       object->dx_diagnostics = other.dx_diagnostics;
       changed = true;
     }
 #endif
   }
   return changed;
 }