Add frame count to paint image.

cc/paint/paint_image.cc

Index: cc/paint/paint_image.cc
diff --git a/cc/paint/paint_image.cc b/cc/paint/paint_image.cc
index 5575cbdad186db3652d9ec787c45b49fff4950c6..a13b972b88bdcb5fd33b5ff6abfa56b98d887f65 100644
--- a/cc/paint/paint_image.cc
+++ b/cc/paint/paint_image.cc
@@ -14,11 +14,13 @@ PaintImage::PaintImage() = default;
 PaintImage::PaintImage(Id id,
                        sk_sp<SkImage> sk_image,
                        AnimationType animation_type,
-                       CompletionState completion_state)
+                       CompletionState completion_state,
+                       size_t frame_count)
     : id_(id),
       sk_image_(std::move(sk_image)),
       animation_type_(animation_type),
-      completion_state_(completion_state) {}
+      completion_state_(completion_state),
+      frame_count_(frame_count) {}
 PaintImage::PaintImage(const PaintImage& other) = default;
 PaintImage::PaintImage(PaintImage&& other) = default;
 PaintImage::~PaintImage() = default;
@@ -29,7 +31,8 @@ PaintImage& PaintImage::operator=(PaintImage&& other) = default;
 bool PaintImage::operator==(const PaintImage& other) const {
   return id_ == other.id_ && sk_image_ == other.sk_image_ &&
          animation_type_ == other.animation_type_ &&
-         completion_state_ == other.completion_state_;
+         completion_state_ == other.completion_state_ &&
+         frame_count_ == other.frame_count_;
 }
 
 PaintImage::Id PaintImage::GetNextId() {