chore: cherry-pick 56de3b2004, bbca3704f9 and f2b0985ac3 from chromium

patches/chromium/.patches

@@ -114,5 +114,8 @@ cherry-pick-2e7c9b33453b.patch
 move_networkstateobserver_from_document_to_window.patch
 cherry-pick-0894af410c4e.patch
 cherry-pick-91dd4f79ab5b.patch
+introduce_crossthreadcopier_skbitmap.patch
+allow_null_skbitmap_to_be_transferred_across_threads.patch
+use_weakptrs_for_the_threadediconloader_s_background_tasks.patch
 cherry-pick-1a8af2da50e4.patch
 cherry-pick-a5f54612590d.patch

patches/chromium/allow_null_skbitmap_to_be_transferred_across_threads.patch

@@ -0,0 +1,40 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Yutaka Hirano <yhirano@chromium.org>
+Date: Tue, 9 Nov 2021 09:03:17 +0000
+Subject: Allow null SkBitmap to be transferred across threads
+
+(cherry picked from commit dad0c0e5162bcc49b8f60354d3bca92224d8381b)
+
+Bug: 1241091
+Change-Id: Ie96932c14c8884d6d3eafa76dab5043e7aa31888
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3251815
+Reviewed-by: Florin Malita <fmalita@chromium.org>
+Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
+Cr-Original-Commit-Position: refs/heads/main@{#936861}
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3268018
+Auto-Submit: Yutaka Hirano <yhirano@chromium.org>
+Reviewed-by: Kentaro Hara <haraken@chromium.org>
+Commit-Queue: Kentaro Hara <haraken@chromium.org>
+Cr-Commit-Position: refs/branch-heads/4664@{#893}
+Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}
+
+diff --git a/third_party/blink/renderer/platform/graphics/skia/skia_utils.h b/third_party/blink/renderer/platform/graphics/skia/skia_utils.h
+index e4bde78252c90ecd19655e8c552a2a39299dff75..33d6a1f115c606c3f203b37642ad2875bcca1dd7 100644
+--- a/third_party/blink/renderer/platform/graphics/skia/skia_utils.h
++++ b/third_party/blink/renderer/platform/graphics/skia/skia_utils.h
+@@ -212,11 +212,13 @@ struct CrossThreadCopier<SkBitmap> {
+
+   using Type = SkBitmap;
+   static SkBitmap Copy(const SkBitmap& bitmap) {
+-    CHECK(bitmap.isImmutable()) << "Only immutable bitmaps can be transferred.";
++    CHECK(bitmap.isImmutable() || bitmap.isNull())
++        << "Only immutable bitmaps can be transferred.";
+     return bitmap;
+   }
+   static SkBitmap Copy(SkBitmap&& bitmap) {
+-    CHECK(bitmap.isImmutable()) << "Only immutable bitmaps can be transferred.";
++    CHECK(bitmap.isImmutable() || bitmap.isNull())
++        << "Only immutable bitmaps can be transferred.";
+     return std::move(bitmap);
+   }
+ };

patches/chromium/introduce_crossthreadcopier_skbitmap.patch

@@ -0,0 +1,62 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Yutaka Hirano <yhirano@chromium.org>
+Date: Tue, 9 Nov 2021 05:02:50 +0000
+Subject: Introduce CrossThreadCopier<SkBitmap>
+
+Allow immutable SkBitmap to be transferred across threads.
+
+(cherry picked from commit fd794ad56432870e462aab9d62e4f059169c1a5f)
+
+Bug: 1241091
+Change-Id: Ia771893245ef2fc1acb05cd4906d64bf2dd406fe
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3244824
+Reviewed-by: danakj <danakj@chromium.org>
+Reviewed-by: Florin Malita <fmalita@chromium.org>
+Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
+Cr-Original-Commit-Position: refs/heads/main@{#936435}
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3267808
+Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
+Reviewed-by: Kentaro Hara <haraken@chromium.org>
+Cr-Commit-Position: refs/branch-heads/4664@{#887}
+Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}
+
+diff --git a/third_party/blink/renderer/platform/graphics/skia/skia_utils.h b/third_party/blink/renderer/platform/graphics/skia/skia_utils.h
+index 0b3efb14964b44ef0929fe33d37cec154d7410b2..e4bde78252c90ecd19655e8c552a2a39299dff75 100644
+--- a/third_party/blink/renderer/platform/graphics/skia/skia_utils.h
++++ b/third_party/blink/renderer/platform/graphics/skia/skia_utils.h
+@@ -39,7 +39,9 @@
+ #include "third_party/blink/renderer/platform/graphics/image.h"
+ #include "third_party/blink/renderer/platform/platform_export.h"
+ #include "third_party/blink/renderer/platform/transforms/affine_transform.h"
++#include "third_party/blink/renderer/platform/wtf/cross_thread_copier.h"
+ #include "third_party/blink/renderer/platform/wtf/math_extras.h"
++#include "third_party/skia/include/core/SkBitmap.h"
+ #include "third_party/skia/include/core/SkCanvas.h"
+ #include "third_party/skia/include/core/SkColor.h"
+ #include "third_party/skia/include/core/SkData.h"
+@@ -200,4 +202,25 @@ PLATFORM_EXPORT sk_sp<SkData> TryAllocateSkData(size_t size);
+
+ }  // namespace blink
+
++namespace WTF {
++
++// We define CrossThreadCopier<SKBitMap> here because we cannot include skia
++// headers in platform/wtf.
++template <>
++struct CrossThreadCopier<SkBitmap> {
++  STATIC_ONLY(CrossThreadCopier);
++
++  using Type = SkBitmap;
++  static SkBitmap Copy(const SkBitmap& bitmap) {
++    CHECK(bitmap.isImmutable()) << "Only immutable bitmaps can be transferred.";
++    return bitmap;
++  }
++  static SkBitmap Copy(SkBitmap&& bitmap) {
++    CHECK(bitmap.isImmutable()) << "Only immutable bitmaps can be transferred.";
++    return std::move(bitmap);
++  }
++};
++
++}  // namespace WTF
++
+ #endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_SKIA_SKIA_UTILS_H_