Fix the problem that the minimized docked panel is not unsqueezed back to its original size when th…

chrome/browser/ui/panels/panel.cc

Index: chrome/browser/ui/panels/panel.cc
diff --git a/chrome/browser/ui/panels/panel.cc b/chrome/browser/ui/panels/panel.cc
index d003bbb20153df22fa26faaaf44a133494cfd389..919ccf165abd370d65aea71cbf449527ba4645f9 100644
--- a/chrome/browser/ui/panels/panel.cc
+++ b/chrome/browser/ui/panels/panel.cc
@@ -470,8 +470,8 @@ void Panel::OnMinimizeButtonClicked(panel::ClickModifier modifier) {
 }
 
 void Panel::OnRestoreButtonClicked(panel::ClickModifier modifier) {
-  if (collection_)
-    collection_->OnRestoreButtonClicked(this, modifier);
+  // Clicking the restore button has the same behavior as clicking the titlebar.
+  OnTitlebarClicked(modifier);
 }
 
 void Panel::OnWindowSizeAvailable() {