[Presentation API / Media Router] Clean up default pres URL logic.

chrome/browser/media/router/presentation_request_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 "chrome/browser/media/router/presentation_request.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace media_router {
+
+TEST(PresentationRequestTest, Equals) {
+  PresentationRequest request1(RenderFrameHostId(1, 2),
+                               "http://presentationUrl",
+                               GURL("http://frameUrl"));
+
+  // Frame IDs are different.
+  PresentationRequest request2(RenderFrameHostId(3, 4),
+                               "http://presentationUrl",
+                               GURL("http://frameUrl"));
+  EXPECT_FALSE(request1.Equals(request2));
+
+  // Presentation URLs are different.
+  PresentationRequest request3(RenderFrameHostId(1, 2),
+                               "http://anotherPresentationUrl",
+                               GURL("http://frameUrl"));
+  EXPECT_FALSE(request1.Equals(request3));
+
+  // Frame URLs are different.
+  PresentationRequest request4(RenderFrameHostId(1, 2),
+                               "http://presentationUrl",
+                               GURL("http://anotherFrameUrl"));
+  EXPECT_FALSE(request1.Equals(request4));
+
+  PresentationRequest request5(RenderFrameHostId(1, 2),
+                               "http://presentationUrl",
+                               GURL("http://frameUrl"));
+  EXPECT_TRUE(request1.Equals(request5));
+}
+
+}  // namespace media_router