Use GrSemaphore rather than GrFence for external texture data

BUG=skia:

Change-Id: I0d23eb9dcf5c01c71d3571ef97690af68b900807
Reviewed-on: https://skia-review.googlesource.com/9141
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gpu/GrSemaphore.h b/src/gpu/GrSemaphore.h
index bdeff09ec2..717b4bb506 100644
--- a/src/gpu/GrSemaphore.h
+++ b/src/gpu/GrSemaphore.h
@@ -13,7 +13,7 @@
 class GrGpu;
 
 class GrSemaphore : public SkRefCnt {
-public:
+private:
     // This function should only be used in the case of exporting and importing a GrSemaphore object
     // from one GrContext to another. When exporting, the GrSemaphore should be set to a null GrGpu,
     // and when importing it should be set to the GrGpu of the current context. Once exported, a
@@ -23,6 +23,8 @@ public:
 protected:
     explicit GrSemaphore(const GrGpu* gpu) : fGpu(gpu) {}
 
+    friend class GrGLExternalTextureData; // resetGpu
+
     const GrGpu* fGpu;
 };