bluetooth: Generate random service uuid and generate random fake adapter.

content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc

Index: content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc
diff --git a/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc b/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc
index ee464629ed7c5adf9909283329a21befa748c75c..53dfa252bd1a933653dd6b15bc160dea1bf931c0 100644
--- a/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc
+++ b/content/shell/browser/layout_test/layout_test_bluetooth_adapter_provider.cc
@@ -176,6 +176,10 @@ LayoutTestBluetoothAdapterProvider::GetBluetoothAdapter(
     return GetDelayedServicesDiscoveryAdapter();
   if (fake_adapter_name.empty())
     return nullptr;
+  // New adapters that can be used when fuzzing the Web Bluetooth API
+  // should also be added to
+  // src/third_party/WebKit/Source/modules/
+  //   bluetooth/testing/clusterfuzz/constraints.py.
 
   NOTREACHED() << fake_adapter_name;
   return nullptr;