Add stats collection for telemetry startup.warm.blank_page test.

components/html_viewer/BUILD.gn

Index: components/html_viewer/BUILD.gn
diff --git a/components/html_viewer/BUILD.gn b/components/html_viewer/BUILD.gn
index d192378aa49655c8082de859d2dc9bbdf9f863a1..642928504168d078c3800906a57e2f10bee86758 100644
--- a/components/html_viewer/BUILD.gn
+++ b/components/html_viewer/BUILD.gn
@@ -102,6 +102,10 @@ source_set("lib") {
     "mock_web_blob_registry_impl.h",
     "replicated_frame_state.cc",
     "replicated_frame_state.h",
+    "stats_collection_controller.cc",
+    "stats_collection_controller.h",
+    "stats_collection_observer.cc",
+    "stats_collection_observer.h",
     "test_html_viewer_impl.cc",
     "test_html_viewer_impl.h",
     "touch_handler.cc",
@@ -145,6 +149,7 @@ source_set("lib") {
     "//components/resource_provider/public/cpp",
     "//components/resource_provider/public/interfaces",
     "//components/scheduler:scheduler",
+    "//components/startup_metric_utils",
     "//components/view_manager/gles2:lib",
     "//components/view_manager/public/interfaces",
     "//components/webcrypto",
@@ -160,8 +165,10 @@ source_set("lib") {
     "//mojo/converters/surfaces",
     "//mojo/message_pump",
     "//mojo/platform_handle",
+    "//mojo/runner:switches",
     "//mojo/services/network/public/cpp",
     "//mojo/services/network/public/interfaces",
+    "//mojo/services/tracing:bindings",
     "//net",
     "//skia",
     "//third_party/mojo_services/src/accessibility/public/interfaces",
@@ -195,6 +202,7 @@ source_set("lib") {
     "//components/clipboard",
     "//components/view_manager",
     "//mojo/services/network:network",
+    "//mojo/services/tracing",
   ]
 }