cc::SkiaRenderer hack prototype

cc/resources/resource_provider.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 204 matching lines @@
   class CC_EXPORT ScopedReadLockGL {
    public:
     ScopedReadLockGL(ResourceProvider* resource_provider,
                      ResourceId resource_id);
     ~ScopedReadLockGL();
 
     unsigned texture_id() const { return texture_id_; }
     GLenum target() const { return target_; }
     const gfx::Size& size() const { return size_; }
 
-   private:
+   protected:
     ResourceProvider* resource_provider_;
     ResourceId resource_id_;
     unsigned texture_id_;
     GLenum target_;
     gfx::Size size_;
 
+   private:
     DISALLOW_COPY_AND_ASSIGN(ScopedReadLockGL);
   };
 
   class CC_EXPORT ScopedSamplerGL {
    public:
     ScopedSamplerGL(ResourceProvider* resource_provider,
                     ResourceId resource_id,
                     GLenum filter);
     ScopedSamplerGL(ResourceProvider* resource_provider,
                     ResourceId resource_id,
@@ skipping 97 matching lines @@
     bool valid() const { return !!sk_bitmap_.getPixels(); }
 
    private:
     ResourceProvider* resource_provider_;
     ResourceId resource_id_;
     SkBitmap sk_bitmap_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedReadLockSoftware);
   };
 
+  class CC_EXPORT ScopedReadLockSkImage {
+   public:
+    ScopedReadLockSkImage(ResourceProvider* resource_provider,
+                          ResourceId resource_id);
+    ~ScopedReadLockSkImage();
+
+    const SkImage* sk_image() const { return sk_image_.get(); }
+
+    bool valid() const { return !!sk_image_; }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceId resource_id_;
+    sk_sp<SkImage> sk_image_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedReadLockSkImage);
+  };
+
   class CC_EXPORT ScopedWriteLockSoftware {
    public:
     ScopedWriteLockSoftware(ResourceProvider* resource_provider,
                             ResourceId resource_id);
     ~ScopedWriteLockSoftware();
 
     SkBitmap& sk_bitmap() { return sk_bitmap_; }
     bool valid() const { return !!sk_bitmap_.getPixels(); }
 
    private:
@@ skipping 322 matching lines @@
   // A process-unique ID used for disambiguating memory dumps from different
   // resource providers.
   int tracing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_