Revert "Add support for semaphores to be inserted on GrContext flush"

This reverts commit cd1416efbc7af6f115dbaa09dce48e075d1d96ca.

Reason for revert: speculative, to try to fix roll see gpu_tests.pixel_integration_test.PixelIntegrationTest.Pixel_GpuRasterization_ConcavePaths

Original change's description:
> Add support for semaphores to be inserted on GrContext flush
> 
> This also moves the logic of inserting semaphores down into GrDrawingManager
> and finishFlush on GrGpu. With it being on finishFlush, there should be no
> issues when the DrawingManager starts respecting the proxy passed in assuming
> it always calls finishFlush at the end (which it should).
> 
> Bug: skia:
> Change-Id: I925c2a289dcbbb9159b9120878af1d34f21a2dc7
> Reviewed-on: https://skia-review.googlesource.com/25641
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com

Change-Id: I9c5b9cf8c060193e1861dbb8f0c10fb11dfb5249
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/25980
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/include/gpu/GrBackendSemaphore.h b/include/gpu/GrBackendSemaphore.h
index cea3745270..5c41532cb9 100644
--- a/include/gpu/GrBackendSemaphore.h
+++ b/include/gpu/GrBackendSemaphore.h
@@ -16,13 +16,6 @@
 #include "vk/GrVkTypes.h"
 #endif
 
-// Enum used as return value when flush with semaphores so the client knows whether the
-// semaphores were submitted to GPU or not.
-enum class GrSemaphoresSubmitted {
-    kNo,
-    kYes,
-};
-
 /**
  * Wrapper class for passing into and receiving data from Ganesh about a backend semaphore object.
  */