Add app.disableDomainBlockingFor3DAPIs()

By default, Chromium disables 3D APIs (e.g. WebGL) until restart on a
per domain basis if the GPU processes crashes too frequently. This
function disables that behaviour.

atom/browser/api/atom_api_app.cc

@@ -35,6 +35,7 @@
 #include "chrome/browser/icon_manager.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/browser/gpu/compositor_util.h"
+#include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/child_process_data.h"
@@ -852,6 +853,17 @@ void App::DisableHardwareAcceleration(mate::Arguments* args) {
   content::GpuDataManager::GetInstance()->DisableHardwareAcceleration();
 }
 
+void App::DisableDomainBlockingFor3DAPIs(mate::Arguments* args) {
+  if (Browser::Get()->is_ready()) {
+    args->ThrowError(
+        "app.disableDomainBlockingFor3DAPIs() can only be called "
+        "before app is ready");
+    return;
+  }
+  content::GpuDataManagerImpl::GetInstance()
+      ->DisableDomainBlockingFor3DAPIsForTesting();
+}
+
 bool App::IsAccessibilitySupportEnabled() {
   auto ax_state = content::BrowserAccessibilityState::GetInstance();
   return ax_state->IsAccessibleBrowser();
@@ -1131,6 +1143,8 @@ void App::BuildPrototype(
                  &App::IsAccessibilitySupportEnabled)
       .SetMethod("disableHardwareAcceleration",
                  &App::DisableHardwareAcceleration)
+      .SetMethod("disableDomainBlockingFor3DAPIs",
+                 &App::DisableDomainBlockingFor3DAPIs)
       .SetMethod("getFileIcon", &App::GetFileIcon)
       .SetMethod("getAppMetrics", &App::GetAppMetrics)
       .SetMethod("getGPUFeatureStatus", &App::GetGPUFeatureStatus)