Load mac sandbox definitions from resources instead of the bundle.

content/common/sandbox_mac_unittest_helper.h

Index: content/common/sandbox_mac_unittest_helper.h
diff --git a/content/common/sandbox_mac_unittest_helper.h b/content/common/sandbox_mac_unittest_helper.h
index 84c32211d082017d6566a69517aaa5c22936b396..1897b23d35ca74117b7e34e2e78081cec1d5759f 100644
--- a/content/common/sandbox_mac_unittest_helper.h
+++ b/content/common/sandbox_mac_unittest_helper.h
@@ -51,12 +51,14 @@ class MacSandboxTest : public base::MultiProcessTest {
   // required.
   // Returns true if the test passes, false if either of the functions in
   // the corresponding MacSandboxTestCase return false.
-  bool RunTestInSandbox(sandbox::Sandbox::SandboxProcessType sandbox_type,
+  bool RunTestInSandbox(content::SandboxProcessType sandbox_type,
                         const char* test_name,
                         const char* test_data);
 
-  // Runs the test specified by |test_name| in all the different sandbox types,
-  // one by one.
+  // Runs the test specified by |test_name| in all the different sandbox types
+  // known to content, one by one.
+  // If the embedder defines additional sandbox types, they won't be covered by
+  // these tests.
   // Returns true if the test passes, false if either of the functions in
   // the corresponding MacSandboxTestCase return false in any of the spawned
   // processes.