URL bar needs accessible name to pass future accessibility checks

Accessibility checks require all views, even in content shell, to have a name.

Bug: None
Change-Id: I6a4d4c7ff826cbd48fc0b91f7173dd2e93862412
Reviewed-on: https://chromium-review.googlesource.com/919305Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536939}

content/shell/browser/shell_views.cc

@@ -175,6 +175,7 @@ class ShellWindowDelegateView : public views::WidgetDelegateView,
       toolbar_column_set->AddPaddingColumn(0, 2);
       // URL entry
       url_entry_ = new views::Textfield();
+      url_entry_->SetAccessibleName(base::ASCIIToUTF16("Enter URL"));
       url_entry_->set_controller(this);
       url_entry_->SetTextInputType(ui::TextInputType::TEXT_INPUT_TYPE_URL);
       toolbar_column_set->AddColumn(views::GridLayout::FILL,