Fix minimum size in app windows on Mac.

chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm

Index: chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm b/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm
index 479114c31a81bbb470f150af05ffa3fdd2f05708..69459861dd171a818feecf172f7f9f054d62a898 100644
--- a/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm
@@ -92,7 +92,7 @@ ShellWindowCocoa::ShellWindowCocoa(Profile* profile,
                   backing:NSBackingStoreBuffered
                     defer:NO]);
   [window setTitle:base::SysUTF8ToNSString(extension->name())];
-  gfx::Size min_size = params.maximum_size;
+  gfx::Size min_size = params.minimum_size;
   if (min_size.width() || min_size.height()) {
     [window setContentMinSize:NSMakeSize(min_size.width(), min_size.height())];
   }