[PresentationAPI] Implementing send() from WebPresentationClient to the PresentationService.

content/browser/presentation/presentation_service_impl_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "content/browser/presentation/presentation_service_impl.h"
 #include "content/public/browser/presentation_service_delegate.h"
 #include "content/public/browser/presentation_session.h"
@@ skipping 166 matching lines @@
 
   void ExpectNewSessionMojoCallbackError(
       presentation::PresentationSessionInfoPtr info,
       presentation::PresentationErrorPtr error) {
     EXPECT_TRUE(info.is_null());
     EXPECT_FALSE(error.is_null());
     if (!run_loop_quit_closure_.is_null())
       run_loop_quit_closure_.Run();
   }
 
+  void ExpectSendMessageMojoCallback() {
+    if (!run_loop_quit_closure_.is_null())
+      run_loop_quit_closure_.Run();
+  }
+
   MockPresentationServiceDelegate mock_delegate_;
   scoped_ptr<PresentationServiceImpl> service_impl_;
   mojo::InterfacePtr<presentation::PresentationService> service_ptr_;
   base::Closure run_loop_quit_closure_;
   int callback_count_;
 };
 
 TEST_F(PresentationServiceImplTest, ListenForScreenAvailability) {
   std::string presentation_url("http://fooUrl");
   ListenForScreenAvailabilityAndWait(
@@ skipping 377 matching lines @@
 
   // Running the callback means the first request is done. It should now
   // move on to the queued request.
   EXPECT_CALL(mock_delegate_, StartSession(
       _, _, Eq(presentation_url2), Eq(presentation_id2), _, _))
       .Times(1);
   success_cb.Run(PresentationSessionInfo(presentation_url1, presentation_id1));
   SaveQuitClosureAndRunLoop();
 }
 
+/*
+ * TODO(s.singapati): Add testcase for SendMessage()
+ */
+
 }  // namespace content