Introduce gpu_trace_event for gpu performance analysis.

chrome/browser/resources/gpu_internals/raw_events_view.css

Index: chrome/browser/resources/gpu_internals/raw_events_view.css
diff --git a/chrome/browser/resources/gpu_internals/raw_events_view.css b/chrome/browser/resources/gpu_internals/raw_events_view.css
new file mode 100644
index 0000000000000000000000000000000000000000..c2829607beba4ec3d95b433e419b647976f9b04a
--- /dev/null
+++ b/chrome/browser/resources/gpu_internals/raw_events_view.css
@@ -0,0 +1,14 @@
+/*
+Copyright (c) 2011 The Chromium Authors. All rights reserved.
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
+*/
+#raw-events-view {
+  padding: 4px;
+}
+
+#raw-events-view-data {
+  cursor: text;
+  font-family: monospace;
+  -webkit-user-select: text;
+}