Support exposing Mojo services between render frames, render threads, and their respective hosts.

chrome/test/base/run_all_unittests.cc

Index: chrome/test/base/run_all_unittests.cc
diff --git a/chrome/test/base/run_all_unittests.cc b/chrome/test/base/run_all_unittests.cc
index ae5b60067b58ad0613f2332a5909903bf8041ad3..cfe6491e16bdf28bd0748a90e54e591e0acc8b24 100644
--- a/chrome/test/base/run_all_unittests.cc
+++ b/chrome/test/base/run_all_unittests.cc
@@ -6,10 +6,12 @@
 #include "base/test/launcher/unit_test_launcher.h"
 #include "chrome/test/base/chrome_unit_test_suite.h"
 #include "content/public/test/unittest_test_suite.h"
+#include "mojo/embedder/embedder.h"
 
 int main(int argc, char **argv) {
   content::UnitTestTestSuite test_suite(new ChromeUnitTestSuite(argc, argv));
 
+  mojo::embedder::Init();
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&content::UnitTestTestSuite::Run,
                              base::Unretained(&test_suite)));