Add more general flush call to GrContext.

This is to match the current features of SkSurface::flush and to prepare
for adding additional features to flush.

Bug: skia:8802
Change-Id: I5d68272e1277b416af357e6ffaf426841ceda943
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/207301
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index c73f9ca..075ac00 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -244,19 +244,18 @@
     RETURN_IF_ABANDONED
 
     this->drawingManager()->flush(nullptr, SkSurface::BackendSurfaceAccess::kNoAccess,
-                                  SkSurface::kNone_FlushFlags, 0, nullptr);
+                                  kNone_GrFlushFlags, 0, nullptr);
 }
 
-GrSemaphoresSubmitted GrContext::flushAndSignalSemaphores(int numSemaphores,
-                                                          GrBackendSemaphore signalSemaphores[]) {
+GrSemaphoresSubmitted GrContext::flush(GrFlushFlags flags, int numSemaphores,
+                                       GrBackendSemaphore signalSemaphores[]) {
     ASSERT_SINGLE_OWNER
     if (this->abandoned()) {
         return GrSemaphoresSubmitted::kNo;
     }
 
     return this->drawingManager()->flush(nullptr, SkSurface::BackendSurfaceAccess::kNoAccess,
-                                         SkSurface::kNone_FlushFlags, numSemaphores,
-                                         signalSemaphores);
+                                         flags, numSemaphores, signalSemaphores);
 }
 
 ////////////////////////////////////////////////////////////////////////////////