Update Panel titlebar text and icon layout when resized on Mac.

chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.mm

Index: chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.mm
diff --git a/chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.mm b/chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.mm
index 9b4648dd98dba9ac90005f7834b72a9aeecf91f7..7c384395b386ccdc04d8aece10b1581382d07545 100644
--- a/chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.mm
+++ b/chrome/browser/ui/panels/panel_browser_window_cocoa_unittest.mm
@@ -251,8 +251,11 @@ TEST_F(PanelBrowserWindowCocoaTest, TitlebarViewSizing) {
   // content view of the window. They both use the same scale factor.
   EXPECT_EQ(NSWidth([contentView bounds]), NSWidth([titlebar bounds]));
 
+  NSRect oldTitleFrame = [[titlebar title] frame];
+  NSRect oldIconFrame = [[titlebar icon] frame];
+
   // Now resize the Panel, see that titlebar follows.
-  const int kDelta = 153; // random number
+  const int kDelta = 153;  // random number
   gfx::Rect bounds = panel->GetBounds();
   // Grow panel in a way so that its titlebar moves and grows.
   bounds.set_x(bounds.x() - kDelta);
@@ -272,6 +275,15 @@ TEST_F(PanelBrowserWindowCocoaTest, TitlebarViewSizing) {
   // Verify the titlebar is still on top of regular titlebar.
   VerifyTitlebarLocation(contentView, titlebar);
 
+  // Verify that the title/icon frames were updated.
+  NSRect newTitleFrame = [[titlebar title] frame];
+  NSRect newIconFrame = [[titlebar icon] frame];
+
+  EXPECT_EQ(newTitleFrame.origin.x - newIconFrame.origin.x,
+            oldTitleFrame.origin.x - oldIconFrame.origin.x);
+  EXPECT_NE(newTitleFrame.origin.x, oldTitleFrame.origin.x);
+  EXPECT_NE(newIconFrame.origin.x, oldIconFrame.origin.x);
+
   ClosePanelAndWait(panel->browser());
 }