Created min size for print preview dialog and modified to allow the

chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm

Index: chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
diff --git a/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm b/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
index 9ef87e6b73aa7350a02eaa7dd2a93749a4a357a0..3ed23b051a22a2d5bf6d3467a10c785b9d929ead 100644
--- a/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
+++ b/chrome/browser/ui/cocoa/constrained_web_dialog_delegate_mac.mm
@@ -245,6 +245,24 @@ ConstrainedWebDialogDelegate* ShowConstrainedWebDialog(
   return constrained_delegate;
 }
 
+ConstrainedWebDialogDelegate* ShowTopLevelConstrainedWebDialog(
+    content::BrowserContext* browser_context,
+    WebDialogDelegate* delegate,
+    content::WebContents* web_contents) {
+  // Mac uses sheets, so we can just use the normal ShowConstrainedWebDialog.
+  return ShowConstrainedWebDialog(browser_context, delegate, web_contents);
+}
+
+// Mac uses sheets so there is no need for this function. Use the normal
+// ShowConstrainedWebDialog.
+ConstrainedWebDialogDelegate* ShowTopLevelConstrainedWebDialogInWindow(
+    content::BrowserContext* browser_context,
+    ui::WebDialogDelegate* delegate,
+    content::WebContents* web_contents,
+    gfx::NativeView dialog_host_window) {
+  return ShowConstrainedWebDialog(browser_context, delegate, web_contents);
+}
+
 ConstrainedWebDialogDelegate* ShowConstrainedWebDialogWithAutoResize(
     content::BrowserContext* browser_context,
     WebDialogDelegate* delegate,