Switch DesktopEnvironment to return a DesktopCapturer.

remoting/host/chromoting_host_unittest.cc

Index: remoting/host/chromoting_host_unittest.cc
diff --git a/remoting/host/chromoting_host_unittest.cc b/remoting/host/chromoting_host_unittest.cc
index 67991955111967cd9a96ca0cb25bfb6d8fd97766..2177dca8ddad6dffa0f5a2c86f7b81810473d0b0 100644
--- a/remoting/host/chromoting_host_unittest.cc
+++ b/remoting/host/chromoting_host_unittest.cc
@@ -11,8 +11,8 @@
 #include "remoting/host/chromoting_host.h"
 #include "remoting/host/chromoting_host_context.h"
 #include "remoting/host/desktop_environment.h"
+#include "remoting/host/fake_desktop_capturer.h"
 #include "remoting/host/fake_mouse_cursor_monitor.h"
-#include "remoting/host/fake_screen_capturer.h"
 #include "remoting/host/host_mock_objects.h"
 #include "remoting/proto/video.pb.h"
 #include "remoting/protocol/errors.h"
@@ -236,7 +236,7 @@ class ChromotingHostTest : public testing::Test {
     host_->OnSessionRouteChange(get_client(0), channel_name, route);
   }
 
-  // Creates a DesktopEnvironment with a fake webrtc::ScreenCapturer, to mock
+  // Creates a DesktopEnvironment with a fake webrtc::DesktopCapturer, to mock
   // DesktopEnvironmentFactory::Create().
   DesktopEnvironment* CreateDesktopEnvironment() {
     MockDesktopEnvironment* desktop_environment = new MockDesktopEnvironment();
@@ -269,10 +269,10 @@ class ChromotingHostTest : public testing::Test {
     return input_injector;
   }
 
-  // Creates a fake webrtc::ScreenCapturer, to mock
+  // Creates a fake webrtc::DesktopCapturer, to mock
   // DesktopEnvironment::CreateVideoCapturer().
-  webrtc::ScreenCapturer* CreateVideoCapturer() {
-    return new FakeScreenCapturer();
+  webrtc::DesktopCapturer* CreateVideoCapturer() {
+    return new FakeDesktopCapturer();
   }
 
   // Creates a MockMouseCursorMonitor, to mock