[Chromoting] Implement host safe-mode

remoting/host/host_attributes.cc

 // Copyright 2016 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 "remoting/host/host_attributes.h"
 
 #if defined(OS_WIN)
 #include <D3DCommon.h>
 #endif
 
 #include <type_traits>
 
 #include "base/atomicops.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "build/build_config.h"
+#include "remoting/host/safe_mode.h"
 
 #if defined(OS_WIN)
 #include "third_party/webrtc/modules/desktop_capture/win/dxgi_duplicator_controller.h"
 #include "third_party/webrtc/modules/desktop_capture/win/screen_capturer_win_directx.h"
 #endif
 
 namespace remoting {
 
 namespace {
 static constexpr char kSeparator[] = ",";
@@ skipping 31 matching lines @@
 #else
   return false;
 #endif
 }
 
 inline constexpr bool IsNonOfficialBuild() {
   return !IsOfficialBuild();
 }
 
 #if defined(OS_WIN)
+inline bool IsDirectxCapturerSupported() {
+  if (ExecuteHostInSafeMode()) {
+    return false;
+  }
+
+  return webrtc::ScreenCapturerWinDirectx::IsSupported();
+}
+
 inline bool MinD3DFeatureLevelGreatThan10() {
+  if (ExecuteHostInSafeMode()) {
+    return false;
+  }
+
   webrtc::DxgiDuplicatorController::D3dInfo info;
   if (webrtc::DxgiDuplicatorController::Instance()->RetrieveD3dInfo(&info)) {
     return info.min_feature_level >= D3D_FEATURE_LEVEL_10_0;
   }
   return false;
 }
 
 inline bool MinD3DFeatureLevelGreatThan11() {
+  if (ExecuteHostInSafeMode()) {
+    return false;
+  }
+
   webrtc::DxgiDuplicatorController::D3dInfo info;
   if (webrtc::DxgiDuplicatorController::Instance()->RetrieveD3dInfo(&info)) {
     return info.min_feature_level >= D3D_FEATURE_LEVEL_11_0;
   }
   return false;
 }
 
 inline bool MinD3DFeatureLevelGreatThan12() {
+  if (ExecuteHostInSafeMode()) {
+    return false;
+  }
+
   webrtc::DxgiDuplicatorController::D3dInfo info;
   if (webrtc::DxgiDuplicatorController::Instance()->RetrieveD3dInfo(&info)) {
     return info.min_feature_level >= D3D_FEATURE_LEVEL_12_0;
   }
   return false;
 }
 #endif
 
 // By using arraysize() macro in base/macros.h, it's illegal to have empty
 // arrays.
 //
 // error: no matching function for call to 'ArraySizeHelper'
 // note: candidate template ignored: substitution failure
 // [with T = const remoting::StaticAttribute, N = 0]:
 // zero-length arrays are not permitted in C++.
 //
 // So we need IsDebug() function, and "Debug-Build" Attribute.
 
 static constexpr Attribute kAttributes[] = {
   { "Debug-Build", &IsDebug },
   { "ChromeBrand", &IsChromeBranded },
   { "ChromiumBrand", &IsChromiumBranded },
   { "OfficialBuild", &IsOfficialBuild },
   { "NonOfficialBuild", &IsNonOfficialBuild },
+  { "Safe-Mode", &ExecuteHostInSafeMode },
 #if defined(OS_WIN)
-  { "DirectX-Capturer", &webrtc::ScreenCapturerWinDirectx::IsSupported },
+  { "DirectX-Capturer", &IsDirectxCapturerSupported },
   { "MinD3DGT10", &MinD3DFeatureLevelGreatThan10 },
   { "MinD3DGT11", &MinD3DFeatureLevelGreatThan11 },
   { "MinD3DGT12", &MinD3DFeatureLevelGreatThan12 },
 #endif
 };
 
 }  // namespace
 
 static_assert(std::is_pod<Attribute>::value, "Attribute should be POD.");
 
@@ skipping 10 matching lines @@
         result.append(kSeparator);
       }
       result.append(attribute.name);
     }
   }
 
   return result;
 }
 
 }  // namespace remoting