[reland] Makes MaterialDesignController initialization explicit

content/public/test/content_test_suite_base.cc

Index: content/public/test/content_test_suite_base.cc
diff --git a/content/public/test/content_test_suite_base.cc b/content/public/test/content_test_suite_base.cc
index f87b4da490e31bf3398d352cf661fc3f5969361a..e01d6df17ddbbd75642cac264104c1fc1d3850bd 100644
--- a/content/public/test/content_test_suite_base.cc
+++ b/content/public/test/content_test_suite_base.cc
@@ -22,6 +22,7 @@
 #include "content/renderer/in_process_renderer_thread.h"
 #include "content/utility/in_process_utility_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/ui_base_paths.h"
 
 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
@@ -107,6 +108,7 @@ void ContentTestSuiteBase::Initialize() {
 
   testing::UnitTest::GetInstance()->listeners().Append(
       new ContentTestSuiteBaseListener);
+  ui::MaterialDesignController::Initialize();
 }
 
 void ContentTestSuiteBase::RegisterContentSchemes(