Add more descriptive labels for views in Mac's first run dialog.

chrome/browser/ui/cocoa/search_engine_dialog_controller.mm

Index: chrome/browser/ui/cocoa/search_engine_dialog_controller.mm
diff --git a/chrome/browser/ui/cocoa/search_engine_dialog_controller.mm b/chrome/browser/ui/cocoa/search_engine_dialog_controller.mm
index a51ae40c6fd1842cc69c2978eba1997eb09c404d..1c654a8fb82a2d860a457604ba24ca7d11d0d23b 100644
--- a/chrome/browser/ui/cocoa/search_engine_dialog_controller.mm
+++ b/chrome/browser/ui/cocoa/search_engine_dialog_controller.mm
@@ -196,6 +196,7 @@ void SearchEngineDialogControllerBridge::OnTemplateURLServiceChanged() {
   NSView* engineIdentifier = nil;  // either the logo or the text label
 
   int logoId = engine->logo_id();
+  NSString* shortName = SysUTF16ToNSString(engine->short_name());
   if (useImages && logoId > 0) {
     NSImage* logoImage =
         ResourceBundle::GetSharedInstance().GetNativeImageNamed(logoId);
@@ -207,7 +208,9 @@ void SearchEngineDialogControllerBridge::OnTemplateURLServiceChanged() {
     [logoView setEditable:NO];
 
     // Tooltip text provides accessibility.
-    [logoView setToolTip:base::SysUTF16ToNSString(engine->short_name())];
+    [logoView setToolTip:shortName];
+    [logoView accessibilitySetOverrideValue:shortName
+        forAttribute:NSAccessibilityDescriptionAttribute];
     engineIdentifier = logoView;
   } else {
     // No logo -- we must show a text label.
@@ -226,9 +229,8 @@ void SearchEngineDialogControllerBridge::OnTemplateURLServiceChanged() {
         paragraphStyle.get(), NSParagraphStyleAttributeName,
         nil];
 
-    NSString* value = base::SysUTF16ToNSString(engine->short_name());
     scoped_nsobject<NSAttributedString> attrValue(
-        [[NSAttributedString alloc] initWithString:value
+        [[NSAttributedString alloc] initWithString:shortName
                                         attributes:attrs]);
 
     [labelField setAttributedStringValue:attrValue.get()];
@@ -248,6 +250,11 @@ void SearchEngineDialogControllerBridge::OnTemplateURLServiceChanged() {
   [chooseButton setTarget:self];
   [chooseButton setAction:@selector(searchEngineSelected:)];
 
+  // Provide a more descriptive accessibility description.
+  id accElement = NSAccessibilityUnignoredDescendant(engineIdentifier);
+  [[chooseButton cell] accessibilitySetOverrideValue:accElement
+      forAttribute:NSAccessibilityTitleUIElementAttribute];
+
   // Put 'em together.
   NSRect engineIdentifierFrame = [engineIdentifier frame];
   NSRect chooseButtonFrame = [chooseButton frame];