Clear analyzer warning on Observatory

runtime/observatory/observatory_sources.gypi

Index: runtime/observatory/observatory_sources.gypi
diff --git a/runtime/observatory/observatory_sources.gypi b/runtime/observatory/observatory_sources.gypi
index 45455f2b1c884d17800192432ed338e2e6df30d3..496dedd03c7bcb788217b63455be46026eff9030 100644
--- a/runtime/observatory/observatory_sources.gypi
+++ b/runtime/observatory/observatory_sources.gypi
@@ -8,7 +8,6 @@
     'lib/allocation_profile.dart',
     'lib/app.dart',
     'lib/cli.dart',
-    'lib/cpu_profile.dart',
     'lib/debugger.dart',
     'lib/elements.dart',
     'lib/event.dart',
@@ -16,6 +15,7 @@
     'lib/models.dart',
     'lib/object_graph.dart',
     'lib/repositories.dart',
+    'lib/sample_profile.dart',
     'lib/service.dart',
     'lib/service_common.dart',
     'lib/service_html.dart',
@@ -29,7 +29,6 @@
     'lib/src/app/settings.dart',
     'lib/src/app/view_model.dart',
     'lib/src/cli/command.dart',
-    'lib/src/cpu_profile/cpu_profile.dart',
     'lib/src/debugger/debugger.dart',
     'lib/src/debugger/debugger_location.dart',
     'lib/src/elements/allocation_profile.dart',
@@ -268,6 +267,7 @@
     'lib/src/repositories/top_retaining_instances.dart',
     'lib/src/repositories/type_arguments.dart',
     'lib/src/repositories/unlinked_call.dart',
+    'lib/src/sample_profile/sample_profile.dart',
     'lib/src/service/object.dart',
     'lib/tracer.dart',
     'lib/utils.dart',