Fix a couple of bugs in the "custom home pages" list in the Preferences window.

1. It was possible to add empty rows to the list by repeatedly clicking the + button.
2. There was a crash when editing an existing item, clearing the text and pressing enter. CustomHomePagesEntry::setURL didn't handle a nil NSString passed to it in this condition.

I added a controlTextDidEndEditing method to PreferencesWindowController that forces a revalidation of the contents of the model backing the TableView.

http://crbug.com/19555
TEST=Click the + button below the custom home pages table view in the Basics page of Preferences. You should get an active edit but not add the item if you don't type anything. Also, try adding a few valid URLs, then click one to edit and delete the URL, then press enter. It should be removed from the table. See also attached unit test.
Review URL: http://codereview.chromium.org/174173

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24635 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 0 deletions

diff --git a/chrome/browser/cocoa/preferences_window_controller.mm b/chrome/browser/cocoa/preferences_window_controller.mm
index 372a4c6..400c6cd 100644
--- a/chrome/browser/cocoa/preferences_window_controller.mm
+++ b/chrome/browser/cocoa/preferences_window_controller.mm
@@ -938,4 +938,8 @@ const int kDisabledIndex = 1;
                     object:self];
 }
 
+- (void)controlTextDidEndEditing:(NSNotification*)notification {
+  [customPagesSource_ validateURLs];
+}
+
 @end