Centralize mojo edk initialization path for some unit tests.

components/test/components_test_suite.cc

Index: components/test/components_test_suite.cc
diff --git a/components/test/components_test_suite.cc b/components/test/components_test_suite.cc
index ef678a4ccc6c438d8e7e83492197a36254fd0757..5fa29d48a2ddb16016374ed96d99aa112977f3a4 100644
--- a/components/test/components_test_suite.cc
+++ b/components/test/components_test_suite.cc
@@ -25,7 +25,6 @@
 #if !defined(OS_IOS)
 #include "content/public/test/test_content_client_initializer.h"
 #include "content/public/test/unittest_test_suite.h"
-#include "mojo/edk/embedder/embedder.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 #endif
 
@@ -154,7 +153,6 @@ base::RunTestSuiteCallback GetLaunchCallback(int argc, char** argv) {
   listeners.Append(new ComponentsUnitTestEventListener());
 
 #if !defined(OS_IOS)
-  mojo::edk::Init();
   return base::Bind(&content::UnitTestTestSuite::Run, std::move(test_suite));
 #else
   return base::Bind(&base::TestSuite::Run, std::move(test_suite));