Added MockPresentationClient to use in layout tests.

content/shell/renderer/test_runner/mock_presentation_client.h

Index: content/shell/renderer/test_runner/mock_presentation_client.h
diff --git a/content/shell/renderer/test_runner/mock_presentation_client.h b/content/shell/renderer/test_runner/mock_presentation_client.h
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+++ b/content/shell/renderer/test_runner/mock_presentation_client.h
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+// 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.
+
+#ifndef CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_PRESENTATION_CLIENT_H_
+#define CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_PRESENTATION_CLIENT_H_
+
+#include "base/macros.h"
+#include "third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h"
+
+namespace content {
+
+// A mock implementation of WebPresentationClient to be used in tests with
+// content shell.
+class MockPresentationClient : public blink::WebPresentationClient {
+ public:
+  explicit MockPresentationClient();
+  virtual ~MockPresentationClient();
+
+  void SetScreenAvailability(bool available);
+
+ private:
+  // From blink::WebPresentationClient.
+  // Passes the Blink-side delegate to the embedder.
+  virtual void setController(blink::WebPresentationController*);
+
+  // Called when the frame attaches the first event listener to or removes the
+  // last event listener from the |availablechange| event.
+  virtual void updateAvailableChangeWatched(bool watched);
+
+  blink::WebPresentationController* controller_;
+  bool screen_availability_;
+
+  DISALLOW_COPY_AND_ASSIGN(MockPresentationClient);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCK_PRESENTATION_CLIENT_H_