bluetooth: Use WebBluetoothDeviceId instead of string

third_party/WebKit/public/BUILD.gn

Index: third_party/WebKit/public/BUILD.gn
diff --git a/third_party/WebKit/public/BUILD.gn b/third_party/WebKit/public/BUILD.gn
index ffee521f9301e84f73a7b057935ba8647a3412fc..08aa5a97eb3bf5882c2c49a2ccb5498c6db9efae 100644
--- a/third_party/WebKit/public/BUILD.gn
+++ b/third_party/WebKit/public/BUILD.gn
@@ -186,6 +186,7 @@ mojom("mojo_bindings") {
   ]
   public_deps = [
     ":android_mojo_bindings",
+    "//content/common/bluetooth:content_mojom_bluetooth_device_id",

[Jeffrey Yasskin, 2016/06/03 17:22:05]

This seems like a wrong-direction dependency. Check with Elliott what we're
supposed to do here?

[ortuno, 2016/06/06 22:23:00]

It does seem weird to depend on content/ from blink. But it's only really the
bindings that depend on it. Blink code will never see the BluetoothDeviceId
type. One option is to move the type to components/web_bluetooth/ which aligns
with the direction jam and rockot want us to go, but it's basically the same but
without the word "content" in the path.

[Jeffrey Yasskin, 2016/06/06 23:44:02]

I guess content/common doesn't depend on WebKit, so there aren't any cycles
here. I'm happy leaving it like this until your WebKit reviewer complains. ;)

     "//device/bluetooth/public/interfaces:bluetooth_mojom_bluetooth_uuid",
   ]
 }