Add multiple selection support to chooser on desktops

chrome/browser/usb/usb_chooser_controller.cc

Index: chrome/browser/usb/usb_chooser_controller.cc
diff --git a/chrome/browser/usb/usb_chooser_controller.cc b/chrome/browser/usb/usb_chooser_controller.cc
index 2075f5917721d523420856394cd1eb1e72aa4136..1e4b0ed9ad461463fdd8307c88ee6d9150d9d292 100644
--- a/chrome/browser/usb/usb_chooser_controller.cc
+++ b/chrome/browser/usb/usb_chooser_controller.cc
@@ -109,7 +109,9 @@ base::string16 UsbChooserController::GetStatus() const {
   return base::string16();
 }
 
-void UsbChooserController::Select(size_t index) {
+void UsbChooserController::Select(const std::vector<size_t>& indices) {
+  DCHECK_EQ(1u, indices.size());
+  size_t index = indices[0];
   DCHECK_LT(index, devices_.size());
   content::WebContents* web_contents =
       content::WebContents::FromRenderFrameHost(render_frame_host_);