Implement in-process PPB_VarArrayBuffer_Dev.

ppapi/tests/test_post_message.h

Index: ppapi/tests/test_post_message.h
diff --git a/ppapi/tests/test_post_message.h b/ppapi/tests/test_post_message.h
index b8e6499108e028bf827c1c42433a90727546f3ee..8ba3e4e16c4146601631c0793576ce44da1c1ba3 100644
--- a/ppapi/tests/test_post_message.h
+++ b/ppapi/tests/test_post_message.h
@@ -52,6 +52,9 @@ class TestPostMessage : public TestCase {
   // in both directions.
   std::string TestSendingData();
 
+  // Test sending ArrayBuffer vars in both directions.
+  std::string TestSendingArrayBuffer();
+
   // Test the MessageEvent object that JavaScript received to make sure it is
   // of the right type and has all the expected fields.
   std::string TestMessageEvent();