Revert "Add a new GrResourceCache purging mechanism for purging unused resources."

This reverts commit fbb56ce83fc717b7c6722324bbccd1ae73c350a4.

Reason for revert: Chrome's ancient libstdc++ doesn't like use of steady_clock

Original change's description:
> Add a new GrResourceCache purging mechanism for purging unused resources.
> 
> The client may call GrContext::purgeResourceNotUsedSince() with a stead_clock::time_point and all resources that have been purgeable since before that time point are purged.
> 
> This is intended to replace the "max unused flushes" purging mechanism once Chrome adopts it.
> 
> Change-Id: I28881dd2959cc01c0acca81b2d6001ee5626439d
> Reviewed-on: https://skia-review.googlesource.com/8920
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Reviewed-by: Eric Karl <ericrk@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com,ericrk@google.com,reviews@skia.org,ericrk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I3baa3b2e80302315b757d4d625732459e13795d4
Reviewed-on: https://skia-review.googlesource.com/10004
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 11 insertions, 14 deletions

diff --git a/include/gpu/GrGpuResource.h b/include/gpu/GrGpuResource.h
index 1c4cbfa104..e0a7903f1d 100644
--- a/include/gpu/GrGpuResource.h
+++ b/include/gpu/GrGpuResource.h
@@ -8,7 +8,6 @@
 #ifndef GrGpuResource_DEFINED
 #define GrGpuResource_DEFINED
 
-#include <chrono>
 #include "GrResourceKey.h"
 #include "GrTypesPriv.h"
 
@@ -316,30 +315,28 @@ private:
     void makeUnbudgeted();
 
 #ifdef SK_DEBUG
-    friend class GrGpu;  // for assert in GrGpu to access getGpu
+    friend class GrGpu; // for assert in GrGpu to access getGpu
 #endif
-
     // An index into a heap when this resource is purgeable or an array when not. This is maintained
     // by the cache.
-    int fCacheArrayIndex;
+    int                         fCacheArrayIndex;
     // This value reflects how recently this resource was accessed in the cache. This is maintained
     // by the cache.
-    uint32_t fTimestamp;
-    uint32_t fExternalFlushCntWhenBecamePurgeable;
-    std::chrono::steady_clock::time_point fTimeWhenBecamePurgeable;
+    uint32_t                    fTimestamp;
+    uint32_t                    fExternalFlushCntWhenBecamePurgeable;
 
     static const size_t kInvalidGpuMemorySize = ~static_cast<size_t>(0);
-    GrScratchKey fScratchKey;
-    GrUniqueKey fUniqueKey;
+    GrScratchKey                fScratchKey;
+    GrUniqueKey                 fUniqueKey;
 
     // This is not ref'ed but abandon() or release() will be called before the GrGpu object
     // is destroyed. Those calls set will this to NULL.
-    GrGpu* fGpu;
-    mutable size_t fGpuMemorySize;
+    GrGpu*                      fGpu;
+    mutable size_t              fGpuMemorySize;
 
-    SkBudgeted fBudgeted;
-    bool fRefsWrappedObjects;
-    const UniqueID fUniqueID;
+    SkBudgeted                  fBudgeted;
+    bool                        fRefsWrappedObjects;
+    const UniqueID              fUniqueID;
 
     typedef GrIORef<GrGpuResource> INHERITED;
     friend class GrIORef<GrGpuResource>; // to access notifyAllCntsAreZero and notifyRefCntIsZero.