Add functions to let tests read and control the Bluetooth chooser state.

content/shell/browser/shell.cc

Index: content/shell/browser/shell.cc
diff --git a/content/shell/browser/shell.cc b/content/shell/browser/shell.cc
index a78bb4ab9a8ddc5b25fd4bea7c5f682782fdbc0c..b273931d361dd5ce9265fe85ec405473f9994df8 100644
--- a/content/shell/browser/shell.cc
+++ b/content/shell/browser/shell.cc
@@ -21,6 +21,7 @@
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/common/renderer_preferences.h"
 #include "content/shell/browser/blink_test_controller.h"
+#include "content/shell/browser/layout_test/layout_test_bluetooth_chooser_factory.h"
 #include "content/shell/browser/layout_test/layout_test_devtools_frontend.h"
 #include "content/shell/browser/layout_test/layout_test_javascript_dialog_manager.h"
 #include "content/shell/browser/notify_done_forwarder.h"
@@ -358,6 +359,19 @@ JavaScriptDialogManager* Shell::GetJavaScriptDialogManager(
   return dialog_manager_.get();
 }
 
+scoped_ptr<BluetoothChooser> Shell::RunBluetoothChooser(
+    WebContents* web_contents,
+    const BluetoothChooser::EventHandler& event_handler,
+    const GURL& origin) {
+  const base::CommandLine& command_line =
+      *base::CommandLine::ForCurrentProcess();
+  if (command_line.HasSwitch(switches::kRunLayoutTest)) {
+    return BlinkTestController::Get()->RunBluetoothChooser(
+        web_contents, event_handler, origin);
+  }
+  return nullptr;
+}
+
 bool Shell::AddMessageToConsole(WebContents* source,
                                 int32 level,
                                 const base::string16& message,