shill: Add mock and unit test skeleton for WiMAX device and service.

BUG=chrome-os-partner:9600
TEST=Build and run unit tests.

Change-Id: I2fe534010ca2645856ece55a9c063bf820c8473b
Reviewed-on: https://gerrit.chromium.org/gerrit/22684
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Ready: Ben Chan <benchan@chromium.org>
Reviewed-by: Darin Petkov <petkov@chromium.org>
diff --git a/wimax_service.h b/wimax_service.h
index 334a81a..b7973bc 100644
--- a/wimax_service.h
+++ b/wimax_service.h
@@ -23,8 +23,11 @@
   virtual bool TechnologyIs(const Technology::Identifier type) const;
   virtual void Connect(Error *error);
   virtual void Disconnect(Error *error);
+  virtual std::string GetStorageIdentifier() const;
 
  private:
+  virtual std::string GetDeviceRpcId(Error *error);
+
   WiMaxRefPtr wimax_;
 
   DISALLOW_COPY_AND_ASSIGN(WiMaxService);