[TimeZoneMonitor] Decouple renderer side impl from content to blink.

content/test/test_blink_web_unit_test_support.cc

Index: content/test/test_blink_web_unit_test_support.cc
diff --git a/content/test/test_blink_web_unit_test_support.cc b/content/test/test_blink_web_unit_test_support.cc
index b8f549db21f7bb1b7ea3635c4f4af5ac58bf8891..eb3d402917fe9e627f4338f88cd326b75d0eb6dc 100644
--- a/content/test/test_blink_web_unit_test_support.cc
+++ b/content/test/test_blink_web_unit_test_support.cc
@@ -19,6 +19,7 @@
 #include "cc/blink/web_layer_impl.h"
 #include "cc/test/test_shared_bitmap_manager.h"
 #include "cc/trees/layer_tree_settings.h"
+#include "content/app/mojo/mojo_init.h"
 #include "content/child/web_url_loader_impl.h"
 #include "content/test/mock_webclipboard_impl.h"
 #include "content/test/web_gesture_curve_mock.h"
@@ -124,6 +125,9 @@ TestBlinkWebUnitTestSupport::TestBlinkWebUnitTestSupport() {
   // an error that it's not set. Cleared by ClearInstanceForTesting() below.
   base::FeatureList::SetInstance(base::WrapUnique(new base::FeatureList));
 
+  // Initialize mojo firstly to enable Blink initialization use it.
+  InitializeMojo();
+
   blink::initialize(this);
   blink::setLayoutTestMode(true);
   blink::WebRuntimeFeatures::enableDatabase(true);