Set minimal width for the username in the password bubble on Mac.

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

Index: chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h
diff --git a/chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h b/chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h
index 476569422103dc6bd9cbc4789bd636326fcbd6b1..a438b111a6c0a587202b04726f9762cad24546fb 100644
--- a/chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h
+++ b/chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h
@@ -19,6 +19,7 @@ constexpr CGFloat kDesiredBubbleWidth = 370;
 constexpr CGFloat kFramePadding = 16;
 constexpr CGFloat kDesiredRowWidth = kDesiredBubbleWidth - 2 * kFramePadding;
 constexpr CGFloat kItemLabelSpacing = 10;
+constexpr CGFloat kMinUsernameSize = 50;
 constexpr CGFloat kRelatedControlHorizontalPadding = 2;
 constexpr CGFloat kRelatedControlVerticalSpacing = 8;
 constexpr CGFloat kTitleTextInset = 2;
@@ -36,7 +37,8 @@ NSSize LabelSize(int resourceID);
 void InitLabel(NSTextField* textField, const base::string16& text);
 
 // Returns widths of 2 columns, that are proportional to |columnsWidth| and
-// their total width is equal to |maxWidth|.
+// their total width is equal to |maxWidth|. The first column won't be shrunk to
+// less than |kMinUsernameSize|.
 std::pair<CGFloat, CGFloat> GetResizedColumns(
     CGFloat maxWidth,
     std::pair<CGFloat, CGFloat> columnsWidth);