Revert "fix: trigger activate event when app is activated via app switcher (#23772)" (#23820)

This reverts commit e671c2c0530a02f741632f1774f5590ad13040fd.

shell/browser/mac/electron_application_delegate.mm

@@ -41,10 +41,7 @@ static base::mac::ScopedObjCClassSwizzler* g_swizzle_imk_input_session;
 @end
 #endif  // BUILDFLAG(USE_ALLOCATOR_SHIM)
 
-@implementation ElectronApplicationDelegate {
- @private
-  bool isFirstActivation_;
-}
+@implementation ElectronApplicationDelegate
 
 - (void)setApplicationDockMenu:(electron::ElectronMenuModel*)model {
   menu_controller_.reset([[ElectronMenuController alloc] initWithModel:model
@@ -81,8 +78,6 @@ static base::mac::ScopedObjCClassSwizzler* g_swizzle_imk_input_session;
         @selector(_coreAttributesFromRange:whichAttributes:completionHandler:));
   }
 #endif
-
-  isFirstActivation_ = true;
 }
 
 - (NSMenu*)applicationDockMenu:(NSApplication*)sender {
@@ -97,35 +92,11 @@ static base::mac::ScopedObjCClassSwizzler* g_swizzle_imk_input_session;
   return electron::Browser::Get()->OpenFile(filename_str) ? YES : NO;
 }
 
-- (void)applicationDidBecomeActive:(NSNotification*)notify {
-  // Originally `applicationShouldHandleReopen:hasVisibleWindows:` was used to
-  // emit Activate event. But the message is sent only when application is
-  // activated via Dock or Finder ignoring the App Switcher (cmd+tab).
-  //
-  // Using `applicationDidBecomeActive' is more reliable but to maintain
-  // compatibility with previous implementation we ignore activation
-  // immediately after the application launch, and compute the
-  // hasVisibleWindows on our own.
-  //
-  // Details in https://github.com/electron/electron/pull/23727.
-
-  if (isFirstActivation_) {
-    isFirstActivation_ = false;
-    return;
-  }
-
-  NSApplication* app = notify.object;
-  bool hasVisibleWindows = false;
-
-  for (NSWindow* win in app.windows) {
-    if (win.isVisible || win.miniaturized) {
-      hasVisibleWindows = true;
-      break;
-    }
-  }
-
+- (BOOL)applicationShouldHandleReopen:(NSApplication*)theApplication
+                    hasVisibleWindows:(BOOL)flag {
   electron::Browser* browser = electron::Browser::Get();
-  browser->Activate(hasVisibleWindows);
+  browser->Activate(static_cast<bool>(flag));
+  return flag;
 }
 
 - (BOOL)application:(NSApplication*)sender