Pull cacheinvalidations code directory into chromium repo.

third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/example_listener.proto

Index: third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/example_listener.proto
diff --git a/third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/example_listener.proto b/third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/example_listener.proto
new file mode 100644
index 0000000000000000000000000000000000000000..bb6d91e64d86315d9a057c1ccaff1585aa1af732
--- /dev/null
+++ b/third_party/cacheinvalidation/src/javaexample/com/google/ipc/invalidation/examples/android2/example_listener.proto
@@ -0,0 +1,30 @@
+syntax = "proto2";
+package ipc.invalidation.examples.android2;
+option java_package = "com.google.ipc.invalidation.examples.android2";
+option java_outer_classname = "ExampleListenerProto";
+
+// Persistent state for the example listener.
+message ExampleListenerStateProto {
+
+  message ObjectIdProto {
+    optional int32 source = 1;
+    optional bytes name = 2;
+  }
+
+  // State related to a particular object being tracked by the listener. See
+  // ExampleListenerState#ObjectState for information on fields.
+  message ObjectStateProto {
+    optional ObjectIdProto object_id = 1;
+    optional bool is_registered = 2;
+    optional bytes payload = 3;
+    optional int64 highest_version = 4;
+    optional int64 invalidation_time_millis = 5;
+    optional bool is_background = 6;
+  }
+
+  // List of objects for which state is being tracked.
+  repeated ObjectStateProto object_state = 1;
+
+  // (Optional) client id passed to the listener in ready() call.
+  optional bytes client_id = 2;
+}