ResizingHostObserver is created by the desktop environment together with other stubs.

remoting/host/desktop_process_unittest.cc

 // Copyright (c) 2012 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 "remoting/host/desktop_process.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
@@ skipping 93 matching lines @@
   void OnDesktopAttached(IPC::PlatformFileForTransit desktop_process);
 
   // Creates a DesktopEnvironment with a fake media::ScreenCapturer, to mock
   // DesktopEnvironmentFactory::Create().
   DesktopEnvironment* CreateDesktopEnvironment();
 
   // Creates a dummy EventExecutor, to mock
   // DesktopEnvironment::CreateEventExecutor().
   EventExecutor* CreateEventExecutor();
 
+  // Creates a dummy SessionController, to mock
+  // DesktopEnvironment::CreateSessionController().
+  SessionController* CreateSessionController();
+
   // Creates a fake media::ScreenCapturer, to mock
   // DesktopEnvironment::CreateVideoCapturer().
   media::ScreenCapturer* CreateVideoCapturer();
 
   // Disconnects the daemon-to-desktop channel causing the desktop process to
   // exit.
   void DisconnectChannels();
 
   // Posts DisconnectChannels() to |message_loop_|.
   void PostDisconnectChannels();
@@ skipping 69 matching lines @@
 }
 
 DesktopEnvironment* DesktopProcessTest::CreateDesktopEnvironment() {
   MockDesktopEnvironment* desktop_environment = new MockDesktopEnvironment();
   EXPECT_CALL(*desktop_environment, CreateAudioCapturerPtr(_))
       .Times(0);
   EXPECT_CALL(*desktop_environment, CreateEventExecutorPtr(_, _))
       .Times(AnyNumber())
       .WillRepeatedly(
           InvokeWithoutArgs(this, &DesktopProcessTest::CreateEventExecutor));
+  EXPECT_CALL(*desktop_environment, CreateSessionControllerPtr())
+      .Times(AnyNumber())
+      .WillRepeatedly(
+          InvokeWithoutArgs(this,
+                            &DesktopProcessTest::CreateSessionController));
   EXPECT_CALL(*desktop_environment, CreateVideoCapturerPtr(_, _))
       .Times(AnyNumber())
       .WillRepeatedly(
           InvokeWithoutArgs(this, &DesktopProcessTest::CreateVideoCapturer));
 
   // Notify the test that the desktop environment has been created.
   network_listener_.OnDesktopEnvironmentCreated();
   return desktop_environment;
 }
 
 EventExecutor* DesktopProcessTest::CreateEventExecutor() {
   MockEventExecutor* event_executor = new MockEventExecutor();
   EXPECT_CALL(*event_executor, StartPtr(_));
   return event_executor;
 }
 
+SessionController* DesktopProcessTest::CreateSessionController() {
+  return new MockSessionController();
+}
+
 media::ScreenCapturer* DesktopProcessTest::CreateVideoCapturer() {
   return new media::ScreenCapturerFake();
 }
 
 void DesktopProcessTest::DisconnectChannels() {
   daemon_channel_.reset();
   network_channel_.reset();
   io_task_runner_ = NULL;
 }
 
@@ skipping 112 matching lines @@
 }
 
 // Run the desktop process and ask it to crash.
 TEST_F(DesktopProcessTest, DeathTest) {
   testing::GTEST_FLAG(death_test_style) = "threadsafe";
 
   EXPECT_DEATH(RunDeathTest(), "");
 }
 
 }  // namespace remoting