Add GrContext::releaseAndAbandonContext()

src/gpu/GrGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGpu_DEFINED
 #define GrGpu_DEFINED
 
@@ skipping 43 matching lines @@
     GrContext* getContext() { return fContext; }
     const GrContext* getContext() const { return fContext; }
 
     /**
      * Gets the capabilities of the draw target.
      */
     const GrCaps* caps() const { return fCaps.get(); }
 
     GrPathRendering* pathRendering() { return fPathRendering.get();  }
 
-    // Called by GrContext when the underlying backend context has been destroyed.
-    // GrGpu should use this to ensure that no backend API calls will be made from
-    // here onward, including in its destructor. Subclasses should call
-    // INHERITED::contextAbandoned() if they override this.
-    virtual void contextAbandoned();
+    enum class DisconnectType {
+        // No cleanup should be attempted, immediately cease making backend API calls
+        kAbandon,
+        // Free allocated resources (not known by GrResourceCache) before returning and
+        // ensure no backend backend 3D API calls will be made after disconnect() returns.
+        kCleanup,
+    };
+
+    // Called by GrContext when the underlying backend context is already or will be destroyed
+    // before GrContext.
+    virtual void disconnect(DisconnectType);
 
     /**
      * The GrGpu object normally assumes that no outsider is setting state
      * within the underlying 3D API's context/device/whatever. This call informs
      * the GrGpu that the state was modified and it shouldn't make assumptions
      * about the state.
      */
     void markContextDirty(uint32_t state = kAll_GrBackendState) { fResetBits |= state; }
 
     /**
@@ skipping 519 matching lines @@
     SkTArray<const MultisampleSpecs*, true>                             fMultisampleSpecsMap;
     GrTAllocator<MultisampleSpecs>                                      fMultisampleSpecsAllocator;
     // The context owns us, not vice-versa, so this ptr is not ref'ed by Gpu.
     GrContext*                                                          fContext;
 
     friend class GrPathRendering;
     typedef SkRefCnt INHERITED;
 };
 
 #endif