Clicking tab close with option key close the other tabs.

chrome/browser/ui/cocoa/tabs/tab_controller.mm

Index: chrome/browser/ui/cocoa/tabs/tab_controller.mm
diff --git a/chrome/browser/ui/cocoa/tabs/tab_controller.mm b/chrome/browser/ui/cocoa/tabs/tab_controller.mm
index 4ee4a99d95d959d2b14a514f56fe26881c525dbd..8b31687061582e2bda18b733bd984a65d1cc9dcb 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_controller.mm
+++ b/chrome/browser/ui/cocoa/tabs/tab_controller.mm
@@ -144,6 +144,13 @@ class MenuDelegate : public ui::SimpleMenuModel::Delegate {
 }
 
 - (IBAction)closeTab:(id)sender {
+  if ([[NSApp currentEvent]  modifierFlags] & NSAlternateKeyMask) {

[Robert Sesek, 2011/08/09 15:20:37]

nit: extra spaces

[bashi, 2011/08/10 06:52:30]

Done.

+    if ([[self target] respondsToSelector:@selector(closeOtherTabs:)]) {

[Robert Sesek, 2011/08/09 15:20:37]

Combine these two if's with &&

[bashi, 2011/08/10 06:52:30]

Done.

+      [[self target] performSelector:@selector(closeOtherTabs:)
+                          withObject:[self view]];
+      return;
+    }
+  }
   if ([[self target] respondsToSelector:@selector(closeTab:)]) {
     [[self target] performSelector:@selector(closeTab:)
                         withObject:[self view]];