Add dependency on webrtc/modules/desktop_capture in chromoting_test_driver
Add dependency on webrtc/modules/desktop_capture in chromoting_test_driver

The test_driver target depends on desktop_capture code, but didn't
have that dependency explicitly. This was causing it to fail to compile,
particularly on WebRTC bots, see
https://build.chromium.org/p/chromium.webrtc/builders/Win%20Builder/builds/36661/steps/compile/logs/stdio

R=joedow@chromium.org
TBR=joedow@chromium.org

Review URL: https://codereview.chromium.org/1872823003 .

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#386183}

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