Alternate NTP: Limit width of tab titles in recent tabs menu

chrome/browser/ui/cocoa/menu_controller.mm

Index: chrome/browser/ui/cocoa/menu_controller.mm
diff --git a/chrome/browser/ui/cocoa/menu_controller.mm b/chrome/browser/ui/cocoa/menu_controller.mm
index 9563ee24b736583f4e22791dfda3ecdfe797a6e6..99c4c14c8bdbbb608ab37832449cabe944378291 100644
--- a/chrome/browser/ui/cocoa/menu_controller.mm
+++ b/chrome/browser/ui/cocoa/menu_controller.mm
@@ -11,6 +11,7 @@
 #include "ui/base/accelerators/platform_accelerator_cocoa.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 #include "ui/base/models/simple_menu_model.h"
+#include "ui/base/text/text_elider.h"
 #include "ui/gfx/image/image.h"
 
 @interface MenuController (Private)
@@ -23,6 +24,14 @@
 @synthesize model = model_;
 @synthesize useWithPopUpButtonCell = useWithPopUpButtonCell_;
 
++ (string16)elideMenuTitle:(const string16&)title
+                   toWidth:(int)width {
+  NSFont* nsfont = [NSFont menuBarFontOfSize:0];  // 0 means "default"
+  gfx::Font font(base::SysNSStringToUTF8([nsfont fontName]),
+                 static_cast<int>([nsfont pointSize]));
+  return ui::ElideText(title, font, width, ui::ELIDE_AT_END);
+}
+
 - (id)init {
   self = [super init];
   return self;
@@ -83,6 +92,11 @@
   return menu;
 }
 
+- (int)maxWidthForMenuModel:(ui::MenuModel*)model
+                 modelIndex:(int)modelIndex {
+  return -1;
+}
+
 // Adds a separator item at the given index. As the separator doesn't need
 // anything from the model, this method doesn't need the model index as the
 // other method below does.
@@ -98,8 +112,12 @@
               atIndex:(NSInteger)index
             fromModel:(ui::MenuModel*)model
            modelIndex:(int)modelIndex {
-  NSString* label =
-      l10n_util::FixUpWindowsStyleLabel(model->GetLabelAt(modelIndex));
+  string16 label16 = model->GetLabelAt(modelIndex);
+  int maxWidth = [self maxWidthForMenuModel:model modelIndex:modelIndex];
+  if (maxWidth != -1)
+    label16 = [MenuController elideMenuTitle:label16 toWidth:maxWidth];
+
+  NSString* label = l10n_util::FixUpWindowsStyleLabel(label16);
   scoped_nsobject<NSMenuItem> item(
       [[NSMenuItem alloc] initWithTitle:label
                                  action:@selector(itemSelected:)