Temporarily disable ppapi mojo test.

An IRT layer is being added to Mojo NaCl support. The change to the Mojo
repository for this will temporarily break ppapi mojo support until a
corresponding chrome change is landed to make the Mojo IRT interface available
in Chrome.

BUG=454466
R=dmichael@chromium.org

Review URL: https://codereview.chromium.org/907913002

Cr-Commit-Position: refs/heads/master@{#315376}

chrome/test/ppapi/ppapi_browsertest.cc

@@ -1572,7 +1572,9 @@ class MojoPPAPITest : public InProcessBrowserTest {
 };
 
 #if defined(OS_POSIX)
-#define MAYBE_MOJO(test_name) test_name
+// TODO(teravest): Re-enable test after Mojo IRT support is enabled in
+// Chrome. http://crbug.com/454466
+#define MAYBE_MOJO(test_name) DISABLED_##test_name
 #else
 #define MAYBE_MOJO(test_name) DISABLED_##test_name
 #endif