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).

patch/patches/chrome_browser_content_settings.patch

@@ -1,5 +1,5 @@
 diff --git chrome/browser/content_settings/host_content_settings_map_factory.cc chrome/browser/content_settings/host_content_settings_map_factory.cc
-index e5c0070b722e..987ded2bacfb 100644
+index 3e2d1221d91e..b0572e99c613 100644
 --- chrome/browser/content_settings/host_content_settings_map_factory.cc
 +++ chrome/browser/content_settings/host_content_settings_map_factory.cc
 @@ -8,6 +8,7 @@
@@ -36,7 +36,7 @@ index e5c0070b722e..987ded2bacfb 100644
  #endif
  }
  
-@@ -99,10 +110,16 @@ scoped_refptr<RefcountedKeyedService>
+@@ -98,10 +109,16 @@ scoped_refptr<RefcountedKeyedService>
        std::move(allowlist_provider));
  
  #if BUILDFLAG(ENABLE_EXTENSIONS)