Import polymer in a single place and remove d3 hacks

tracing/tracing_build/trace2html.py

Index: tracing/tracing_build/trace2html.py
diff --git a/tracing/tracing_build/trace2html.py b/tracing/tracing_build/trace2html.py
index 739ffda2dfe069ef64fd84a6a0ff85770bf86aa1..96006b247cf0c8900281329986251ae0b6c90fb4 100644
--- a/tracing/tracing_build/trace2html.py
+++ b/tracing/tracing_build/trace2html.py
@@ -81,13 +81,9 @@ def WriteHTMLForTraceDataToFile(trace_data_list,
     config_name = project.GetDefaultConfigName()
 
   modules = [
-      # Import the config before trace2html. We do this because the UI has some
-      # global initialization (e.g. Polymer, d3) that can be finnicky about the
-      # order in which things happen.
+      'tracing.trace2html',
       project.GetModuleNameForConfigName(config_name),
-      'tracing.trace2html'
   ]
-
   vulcanizer = project.CreateVulcanizer()
   load_sequence = vulcanizer.CalcLoadSequenceForModuleNames(modules)