Update to Chromium version 86.0.4240.0 (#800218)

- CefURLRequest::Create is no longer supported in the renderer process
  (see https://crbug.com/891872). Use CefFrame::CreateURLRequest instead.
- Mac platform definitions have been changed from `MACOSX` to `MAC`
  (see https://crbug.com/1105907) and related CMake macro names have
  been updated. The old `OS_MACOSX` define is still set in code and CMake
  for backwards compatibility.
- Linux ARM build is currently broken (see https://crbug.com/1123214).

libcef_dll/CMakeLists.txt.in

@@ -4,8 +4,8 @@
 
 # Append platform specific sources to a list of sources.
 macro(LIBCEF_APPEND_PLATFORM_SOURCES name_of_list)
-  if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin" AND ${name_of_list}_MACOSX)
-    list(APPEND ${name_of_list} ${${name_of_list}_MACOSX})
+  if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin" AND ${name_of_list}_MAC)
+    list(APPEND ${name_of_list} ${${name_of_list}_MAC})
   endif()
   if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" AND ${name_of_list}_LINUX)
     list(APPEND ${name_of_list} ${${name_of_list}_LINUX})
@@ -28,16 +28,16 @@ set(CEF_TARGET libcef_dll_wrapper)
     'includes_capi',
     'autogen_capi_includes',
     'includes_wrapper',
-    'includes_wrapper_mac:MACOSX',
+    'includes_wrapper_mac:MAC',
     'includes_win:WINDOWS',
     'includes_win_capi:WINDOWS',
-    'includes_mac:MACOSX',
-    'includes_mac_capi:MACOSX',
+    'includes_mac:MAC',
+    'includes_mac_capi:MAC',
     'includes_linux:LINUX',
     'includes_linux_capi:LINUX',
     'libcef_dll_wrapper_sources_base',
     'libcef_dll_wrapper_sources_common',
-    'libcef_dll_wrapper_sources_mac:MACOSX',
+    'libcef_dll_wrapper_sources_mac:MAC',
     'autogen_client_side',
   ],
 }}

libcef_dll/sandbox/sandbox_win.cc

@@ -2,6 +2,7 @@
 // 2011 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 "base/logging.h"
 #include "sandbox/win/src/process_mitigations.h"
 #include "sandbox/win/src/sandbox_factory.h"
 
@@ -37,3 +38,13 @@ void* cef_sandbox_info_create() {
 void cef_sandbox_info_destroy(void* sandbox_info) {
   delete static_cast<sandbox::SandboxInterfaceInfo*>(sandbox_info);
 }
+
+// Implementation from third_party/abseil-cpp/absl/types/bad_variant_access.cc
+// to avoid bringing in absl dependencies.
+namespace absl {
+namespace variant_internal {
+void ThrowBadVariantAccess() {
+  LOG(FATAL) << "Bad variant access";
+}
+}  // namespace variant_internal
+}  // namespace absl