Remove dangling ManagePasswordsBubbleModel pointers. Test that different password bubbles don't pin…

chrome/browser/ui/cocoa/passwords/base_passwords_content_view_controller.h

Index: chrome/browser/ui/cocoa/passwords/base_passwords_content_view_controller.h
diff --git a/chrome/browser/ui/cocoa/passwords/base_passwords_content_view_controller.h b/chrome/browser/ui/cocoa/passwords/base_passwords_content_view_controller.h
index 839d7c438a918959216dec0ac73f38fe479d9140..5cefe8f7644efed919d3ad585275960426ecdac3 100644
--- a/chrome/browser/ui/cocoa/passwords/base_passwords_content_view_controller.h
+++ b/chrome/browser/ui/cocoa/passwords/base_passwords_content_view_controller.h
@@ -10,7 +10,7 @@
 class ManagePasswordsBubbleModel;
 
 // Handles user interaction with the content view.
-@protocol ManagePasswordsBubbleContentViewDelegate<NSObject>
+@protocol BasePasswordsContentViewDelegate<NSObject>
 
 // The user performed an action that should dismiss the bubble.
 - (void)viewShouldDismiss;
@@ -21,10 +21,11 @@ class ManagePasswordsBubbleModel;
 @end
 
 // Base class for a state of the password management bubble.
-@interface ManagePasswordsBubbleContentViewController : NSViewController {
-  id<ManagePasswordsBubbleContentViewDelegate> delegate_;  // Weak.
+@interface BasePasswordsContentViewController : NSViewController {
+ @private
+  id<BasePasswordsContentViewDelegate> delegate_;  // Weak.
 }
-- (id)initWithDelegate:(id<ManagePasswordsBubbleContentViewDelegate>)delegate;
+- (instancetype)initWithDelegate:(id<BasePasswordsContentViewDelegate>)delegate;
 - (NSButton*)addButton:(NSString*)title
                 toView:(NSView*)view
                 target:(id)target
@@ -36,8 +37,7 @@ class ManagePasswordsBubbleModel;
 // Returns the default button for the bubble.
 - (NSButton*)defaultButton;
 
-@property(nonatomic, assign)
-    id<ManagePasswordsBubbleContentViewDelegate> delegate;
+@property(nonatomic, assign) id<BasePasswordsContentViewDelegate> delegate;
 
 @end