Fixed comment about SkLightingShader::Context memory handling

src/core/SkLightingShader.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmapProcShader.h"
 #include "SkBitmapProcState.h"
 #include "SkColor.h"
@@ skipping 40 matching lines @@
         , fLights(std::move(lights)) {}
 
     bool isOpaque() const override;
 
 #if SK_SUPPORT_GPU
     sk_sp<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override;
 #endif
 
     class LightingShaderContext : public SkShader::Context {
     public:
-        // The context takes ownership of the states. It will call their destructors
-        // but will NOT free the memory.
+        // The context takes ownership of the context and provider. It will call their destructors
+        // and then indirectly free their memory by calling free() on heapAllocated
         LightingShaderContext(const SkLightingShaderImpl&, const ContextRec&,
                               SkShader::Context* diffuseContext, SkNormalSource::Provider*,
                               void* heapAllocated);
 
         ~LightingShaderContext() override;
 
         void shadeSpan(int x, int y, SkPMColor[], int count) override;
 
         uint32_t getFlags() const override { return fFlags; }
 
@@ skipping 451 matching lines @@
                                             std::move(lights));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkLightingShader)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLightingShaderImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
 
 ///////////////////////////////////////////////////////////////////////////////