Refactor to separate backend object lifecycle and GpuResource budget decision

include/gpu/GrTypes.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypes_DEFINED
 #define GrTypes_DEFINED
 
@@ skipping 407 matching lines @@
      * should be verified.
      */
     kCheckAllocation_GrSurfaceFlag  = 0x4,
 };
 
 GR_MAKE_BITFIELD_OPS(GrSurfaceFlags)
 
 // opaque type for 3D API object handles
 typedef intptr_t GrBackendObject;
 
+enum class GrBackendObjectOwnership : bool {

[Kimmo Kinnunen, 2016/04/20 13:59:03]

I guess now this is quite similar to below..

[bsalomon, 2016/04/20 15:48:03]

Looking at the latest CL I think it makes sense to keep it separate. However,
can it be moved to GrGpuResource.h or GrTypesPriv.h?

+    /** Holder does not destroy the backend object. */
+    kBorrowed = false,
+    /** Holder destroys the backend object. */
+    kOwned = true
+};
+
 /**
  * Some textures will be stored such that the upper and left edges of the content meet at the
  * the origin (in texture coord space) and for other textures the lower and left edges meet at
  * the origin. kDefault_GrSurfaceOrigin sets textures to TopLeft, and render targets
  * to BottomLeft.
  */
 
 enum GrSurfaceOrigin {
     kDefault_GrSurfaceOrigin,         // DEPRECATED; to be removed
     kTopLeft_GrSurfaceOrigin,
@@ skipping 49 matching lines @@
  */
 enum GrClipType {
     kRect_ClipType,
     kPath_ClipType
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 
 /** Ownership rules for external GPU resources imported into Skia. */
 enum GrWrapOwnership {

[Kimmo Kinnunen, 2016/04/20 13:59:03]

.. similar to this.
The docstrings will be confusing.
Your call.

     /** Skia will assume the client will keep the resource alive and Skia will not free it. */
     kBorrow_GrWrapOwnership,
 
     /** Skia will assume ownership of the resource and free it. */
     kAdopt_GrWrapOwnership,
 };
 
 /**
  * Gr can wrap an existing texture created by the client with a GrTexture
  * object. The client is responsible for ensuring that the texture lives at
@@ skipping 130 matching lines @@
             return 4 * width * height;
     }
 }
 
 /**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;
 
 #endif