Minimized panels should not open on Windows when activated by the OS

chrome/browser/ui/panels/panel_window_controller_cocoa.mm

Index: chrome/browser/ui/panels/panel_window_controller_cocoa.mm
diff --git a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
index 97f05e339422a55d03b1bd7ca2f473e21867d7a5..fc16924d56724022d7f707fa9f2f99b0a60184de 100644
--- a/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
+++ b/chrome/browser/ui/panels/panel_window_controller_cocoa.mm
@@ -79,6 +79,7 @@ enum {
   if ((self = [super initWithWindowNibPath:nibpath owner:self])) {
     windowShim_.reset(window);
     animateOnBoundsChange_ = YES;
+    canBecomeKeyWindow_ = YES;
   }
   contentsController_.reset(
       [[TabContentsController alloc] initWithContents:nil]);
@@ -623,6 +624,10 @@ enum {
     [NSApp deactivate];
 }
 
+- (void)preventBecomingKeyWindow:(BOOL)prevent {
+  canBecomeKeyWindow_ = !prevent;
+}
+
 - (void)fullScreenModeChanged:(bool)isFullScreen {
   NSWindow* window = [self window];
   [window setLevel:(isFullScreen ? NSNormalWindowLevel : NSStatusWindowLevel)];
@@ -634,6 +639,6 @@ enum {
   // TODO(dimich): If it will be ever desired to expand/focus the Panel on
   // keyboard navigation or via main menu, the care should be taken to avoid
   // cases when minimized Panel is getting keyboard input, invisibly.
-  return windowShim_->panel()->expansion_state() == Panel::EXPANDED;
+  return canBecomeKeyWindow_;
 }
 @end