Add means for running some tests only o-o-p, add messaging o-o-p test.

ppapi/c/dev/ppb_testing_dev.h

Index: ppapi/c/dev/ppb_testing_dev.h
diff --git a/ppapi/c/dev/ppb_testing_dev.h b/ppapi/c/dev/ppb_testing_dev.h
index ec7010240a74c166ad02ef180ed9727dc7473bd8..5f16ce354c75f2995b1034f9c17ae706dec004a3 100644
--- a/ppapi/c/dev/ppb_testing_dev.h
+++ b/ppapi/c/dev/ppb_testing_dev.h
@@ -12,8 +12,10 @@
 
 struct PP_Point;
 
+// TODO(dmichael): Delete support for 0.6.
 #define PPB_TESTING_DEV_INTERFACE_0_6 "PPB_Testing(Dev);0.6"
-#define PPB_TESTING_DEV_INTERFACE PPB_TESTING_DEV_INTERFACE_0_6
+#define PPB_TESTING_DEV_INTERFACE_0_7 "PPB_Testing(Dev);0.7"
+#define PPB_TESTING_DEV_INTERFACE PPB_TESTING_DEV_INTERFACE_0_7
 
 // This interface contains functions used for unit testing. Do not use in
 // production code. They are not guaranteed to be available in normal plugin
@@ -68,6 +70,10 @@ struct PPB_Testing_Dev {
   // associated with this plugin instance. Used for detecting leaks. Returns
   // (uint32_t)-1 on failure.
   uint32_t (*GetLiveObjectsForInstance)(PP_Instance instance);
+
+  // Returns PP_TRUE if the plugin is running out-of-process, PP_FALSE
+  // otherwise.
+  PP_Bool (*IsOutOfProcess)();
 };
 
 #endif  /* PPAPI_C_DEV_PPB_TESTING_DEV_H_ */