LabelButton: SetAccessibleName on SetText; update test.

ui/views/controls/button/label_button.cc

Index: ui/views/controls/button/label_button.cc
diff --git a/ui/views/controls/button/label_button.cc b/ui/views/controls/button/label_button.cc
index 6ca6a98194017f3476d310474ed5df20cbee658a..e43a53171951b772d749966d298ddf23289bf9e8 100644
--- a/ui/views/controls/button/label_button.cc
+++ b/ui/views/controls/button/label_button.cc
@@ -35,13 +35,14 @@ const char LabelButton::kViewClassName[] = "views/LabelButton";
 LabelButton::LabelButton(ButtonListener* listener, const string16& text)
     : CustomButton(listener),
       image_(new ImageView()),
-      label_(new Label(text)),
+      label_(new Label()),
       button_state_images_(),
       button_state_colors_(),
       explicitly_set_colors_(),
       is_default_(false),
       style_(STYLE_TEXTBUTTON) {
   SetAnimationDuration(kHoverAnimationDurationMs);
+  SetText(text);
 
   AddChildView(image_);
   image_->set_interactive(false);
@@ -72,6 +73,7 @@ const string16& LabelButton::GetText() const {
 }
 
 void LabelButton::SetText(const string16& text) {
+  SetAccessibleName(text);
   label_->SetText(text);
 }
 
@@ -125,6 +127,8 @@ void LabelButton::SetStyle(ButtonStyle style) {
     set_focus_border(FocusBorder::CreateDashedFocusBorder(3, 3, 3, 3));
   if (style == STYLE_BUTTON || style_ == STYLE_NATIVE_TEXTBUTTON)
     label_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
+  if (style == STYLE_NATIVE_TEXTBUTTON)

[msw, 2013/04/05 01:06:18]

This CL depends on this change from:
https://codereview.chromium.org/13639003/
It's only included here for trybot testing.

+    set_focusable(true);
   if (style == STYLE_BUTTON) {
     set_min_size(gfx::Size(70, 31));
     const SkColor color = GetNativeTheme()->GetSystemColor(