[Windows] Disable Renderer AppContainer.

Disable the Renderer AppContainer feature as it seems to be increasing
crash rates due to DLL delay loading failures.

Bug: 1024027
Change-Id: Ib4be829f63ba871fd43fc28f0ab7a1a1cdf04f3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1925195Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: James Forshaw <forshaw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717226}

services/service_manager/sandbox/win/sandbox_win.cc

@@ -555,7 +555,7 @@ bool IsAppContainerEnabled() {
     return false;
 
   return base::FeatureList::IsEnabled(
-      {"RendererAppContainer", base::FEATURE_ENABLED_BY_DEFAULT});
+      {"RendererAppContainer", base::FEATURE_DISABLED_BY_DEFAULT});
 }
 
 sandbox::ResultCode SetJobMemoryLimit(const base::CommandLine& cmd_line,