feat: add app.isHardwareAccelerationEnabled() (#47614)

* feat: add app.isHardwareAccelerationEnabled()

* chore: address review feedback

shell/browser/api/electron_api_app.cc

@@ -1140,6 +1140,10 @@ void App::DisableHardwareAcceleration(gin_helper::ErrorThrower thrower) {
         "before app is ready");
     return;
   }
+
+  // If the GpuDataManager is already initialized, disable hardware
+  // acceleration immediately. Otherwise, set a flag to disable it in
+  // OnPreCreateThreads().
   if (content::GpuDataManager::Initialized()) {
     content::GpuDataManager::GetInstance()->DisableHardwareAcceleration();
   } else {
@@ -1147,6 +1151,13 @@ void App::DisableHardwareAcceleration(gin_helper::ErrorThrower thrower) {
   }
 }
 
+bool App::IsHardwareAccelerationEnabled() {
+  if (content::GpuDataManager::Initialized())
+    return content::GpuDataManager::GetInstance()
+        ->HardwareAccelerationEnabled();
+  return !disable_hw_acceleration_;
+}
+
 void App::DisableDomainBlockingFor3DAPIs(gin_helper::ErrorThrower thrower) {
   if (Browser::Get()->is_ready()) {
     thrower.ThrowError(
@@ -1926,6 +1937,8 @@ gin::ObjectTemplateBuilder App::GetObjectTemplateBuilder(v8::Isolate* isolate) {
                  &App::SetAccessibilitySupportEnabled)
       .SetMethod("disableHardwareAcceleration",
                  &App::DisableHardwareAcceleration)
+      .SetMethod("isHardwareAccelerationEnabled",
+                 &App::IsHardwareAccelerationEnabled)
       .SetMethod("disableDomainBlockingFor3DAPIs",
                  &App::DisableDomainBlockingFor3DAPIs)
       .SetMethod("getFileIcon", &App::GetFileIcon)

shell/browser/api/electron_api_app.h

@@ -213,6 +213,7 @@ class App final : public gin::Wrappable<App>,
   void ReleaseSingleInstanceLock();
   bool Relaunch(gin::Arguments* args);
   void DisableHardwareAcceleration(gin_helper::ErrorThrower thrower);
+  bool IsHardwareAccelerationEnabled();
   void DisableDomainBlockingFor3DAPIs(gin_helper::ErrorThrower thrower);
   bool IsAccessibilitySupportEnabled();
   v8::Local<v8::Value> GetAccessibilitySupportFeatures();