cc/blink: Veto checker-imaging for multipart image resources.

cc/paint/paint_image.h

 // Copyright 2017 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_PAINT_PAINT_IMAGE_H_
 #define CC_PAINT_PAINT_IMAGE_H_
 
 #include "base/logging.h"
 #include "cc/paint/paint_export.h"
 #include "third_party/skia/include/core/SkImage.h"
@@ skipping 27 matching lines @@
   // - id: stable id for this image; can be generated using GetNextId().
   // - sk_image: the underlying skia image that this represents.
   // - animation_type: the animation type of this paint image.
   // - completion_state: indicates whether the image is completed loading.
   // - frame_count: the known number of frames in this image. E.g. number of GIF
   //   frames in an animated GIF.
   explicit PaintImage(Id id,
                       sk_sp<SkImage> sk_image,
                       AnimationType animation_type = AnimationType::STATIC,
                       CompletionState completion_state = CompletionState::DONE,
-                      size_t frame_count = 0);
+                      size_t frame_count = 0,
+                      bool is_multipart = false);
   PaintImage(const PaintImage& other);
   PaintImage(PaintImage&& other);
   ~PaintImage();
 
   PaintImage& operator=(const PaintImage& other);
   PaintImage& operator=(PaintImage&& other);
 
   bool operator==(const PaintImage& other) const;
   explicit operator bool() const { return sk_image_; }
 
   Id stable_id() const { return id_; }
   const sk_sp<SkImage>& sk_image() const { return sk_image_; }
   AnimationType animation_type() const { return animation_type_; }
   CompletionState completion_state() const { return completion_state_; }
   size_t frame_count() const { return frame_count_; }
+  bool is_multipart() const { return is_multipart_; }
 
  private:
   Id id_ = kUnknownStableId;
   sk_sp<SkImage> sk_image_;
   AnimationType animation_type_ = AnimationType::UNKNOWN;
   CompletionState completion_state_ = CompletionState::UNKNOWN;
   // The number of frames known to exist in this image (eg number of GIF frames
   // loaded). 0 indicates either unknown or only a single frame, both of which
   // should be treated similarly.
   size_t frame_count_ = 0;
+
+  // Whether the data fetched for this image is a part of a multpart response.
+  bool is_multipart_ = false;
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_PAINT_IMAGE_H_