Revert "Disable all failing capture_unittests after latest Chrome OS LKGM update."

This reverts commit 2c8f8ff6.

Reason for revert: New LKGM updates have landed. Could be safe to re-enable. 

Original change's description:
> Disable all failing capture_unittests after latest Chrome OS LKGM update.
> 
> These tests have started failing after fec354dc.
> 
> Tbr: guidou@chromium.org
> Bug: 1048934
> Change-Id: Id54e609d286cea6c4b2506edc11c3bc1433d46c4
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2038253
> Commit-Queue: Ben Pastene <bpastene@chromium.org>
> Reviewed-by: Ben Pastene <bpastene@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#738428}

TBR=guidou@chromium.org,bpastene@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 1048934
Change-Id: I3b06ed57ad1544cf1e7969143140d1c50ebc0559
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2050574Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740448}

media/capture/video/video_capture_device_unittest.cc

@@ -94,11 +94,9 @@
 #define MAYBE_UsingRealWebcam_AllocateBadSize \
   DISABLED_UsingRealWebcam_AllocateBadSize
 #define MAYBE_UsingRealWebcam_CaptureMjpeg UsingRealWebcam_CaptureMjpeg
-#define MAYBE_UsingRealWebcam_TakePhoto DISABLED_UsingRealWebcam_TakePhoto
-#define MAYBE_UsingRealWebcam_GetPhotoState \
-  DISABLED_UsingRealWebcam_GetPhotoState
-#define MAYBE_UsingRealWebcam_CaptureWithSize \
-  DISABLED_UsingRealWebcam_CaptureWithSize
+#define MAYBE_UsingRealWebcam_TakePhoto UsingRealWebcam_TakePhoto
+#define MAYBE_UsingRealWebcam_GetPhotoState UsingRealWebcam_GetPhotoState
+#define MAYBE_UsingRealWebcam_CaptureWithSize UsingRealWebcam_CaptureWithSize
 #define MAYBE_UsingRealWebcam_CheckPhotoCallbackRelease \
   UsingRealWebcam_CheckPhotoCallbackRelease
 #elif defined(OS_LINUX)
@@ -481,8 +479,6 @@ class VideoCaptureDeviceTest
 // Cause hangs on Windows Debug. http://crbug.com/417824
 #if defined(OS_WIN) && !defined(NDEBUG)
 #define MAYBE_OpenInvalidDevice DISABLED_OpenInvalidDevice
-#elif defined(OS_CHROMEOS)
-#define MAYBE_OpenInvalidDevice DISABLED_OpenInvalidDevice
 #else
 #define MAYBE_OpenInvalidDevice OpenInvalidDevice
 #endif
@@ -711,13 +707,7 @@ void VideoCaptureDeviceTest::RunCaptureMjpegTestCase() {
   device->StopAndDeAllocate();
 }
 
-#if defined(OS_CHROMEOS)
-#define MAYBE_NoCameraSupportsPixelFormatMax \
-  DISABLED_NoCameraSupportsPixelFormatMax
-#else
-#define MAYBE_NoCameraSupportsPixelFormatMax NoCameraSupportsPixelFormatMax
-#endif
-WRAPPED_TEST_P(VideoCaptureDeviceTest, MAYBE_NoCameraSupportsPixelFormatMax) {
+WRAPPED_TEST_P(VideoCaptureDeviceTest, NoCameraSupportsPixelFormatMax) {
   RunTestCase(base::BindOnce(
       &VideoCaptureDeviceTest::RunNoCameraSupportsPixelFormatMaxTestCase,
       base::Unretained(this)));