Change WebBluetooth chooser OK button's label to be "Pair"

chrome/browser/chooser_controller/chooser_controller.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chooser_controller/chooser_controller.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/url_formatter/elide_url.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 ChooserController::ChooserController(content::RenderFrameHost* owner)
     : owning_frame_(owner) {}
 
 ChooserController::~ChooserController() {}
 
 base::string16 ChooserController::GetTitle() {
   return l10n_util::GetStringFUTF16(
       title_prefix_has_quote_ ? IDS_DEVICE_CHOOSER_PROMPT_EXTENSION_NAME
                               : IDS_DEVICE_CHOOSER_PROMPT_ORIGIN,
       GetTitlePrefix());
 }
 
+base::string16 ChooserController::GetOkButtonLabel() const {
+  return base::string16();
+}
+
 base::string16 ChooserController::GetTitlePrefix() {
   if (!owning_frame_)
     return base::string16();
 
   base::string16 title_prefix;
   url::Origin origin = owning_frame_->GetLastCommittedOrigin();
   if (origin.scheme() == extensions::kExtensionScheme) {
     content::WebContents* web_contents =
         content::WebContents::FromRenderFrameHost(owning_frame_);
     content::BrowserContext* browser_context =
@@ skipping 10 matching lines @@
   }
 
   if (title_prefix.empty()) {
     title_prefix = url_formatter::FormatOriginForSecurityDisplay(
         origin, url_formatter::SchemeDisplay::OMIT_CRYPTOGRAPHIC);
     title_prefix_has_quote_ = false;
   }
 
   return title_prefix;
 }