Mac: remove cursor turd from About dialog.

chrome/browser/cocoa/about_window_controller.mm

Index: chrome/browser/cocoa/about_window_controller.mm
diff --git a/chrome/browser/cocoa/about_window_controller.mm b/chrome/browser/cocoa/about_window_controller.mm
index 0b2b20f5eb38ee19ed8683084acb8197e13f5e02..1cce20c9d5de2d7148f7ca81e70a0e0e0e28a2dc 100644
--- a/chrome/browser/cocoa/about_window_controller.mm
+++ b/chrome/browser/cocoa/about_window_controller.mm
@@ -72,6 +72,16 @@ void AttributedStringAppendHyperlink(NSMutableAttributedString* attr_str,
 
 @end  // @interface AboutWindowController(Private)
 
+@implementation AboutLegalTextView
+
+// Never draw the insertion point (otherwise, it shows up without any user
+// action if full keyboard accessibility is enabled).
+- (BOOL)shouldDrawInsertionPoint {
+  return NO;
+}
+
+@end
+
 @implementation AboutWindowController
 
 - (id)initWithProfile:(Profile*)profile {