Increase bitmap deserialization limits in mojom transfer

The change https://crrev.com/c/2368484 introduced bitmap limits while
deserializing the bitmap data in mojom transfer. This regressed large
bitmap transfers b/n the processes which used to work before
(Ex: Navigator.clipboard.write)

The limits were chosen arbitrarily to validate that the image isn't
incredibly large due to any programming error, but 32k is not a fair
limit. Increase the limit to 64k which can accommodate images from the
largest possible canvas(64k is the canvas max possible dimension)

Bug: 1142852
Change-Id: I7c6b32d8ac8549b9053178d477e7c7610add3f3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2504012Reviewed-by: Greg Kerr <kerrnel@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Akhila Veerapuraju <dhveerap@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#821750}

skia/public/mojom/bitmap_skbitmap_mojom_traits.cc

@@ -10,9 +10,11 @@ namespace mojo {
 namespace {
 
 // Maximum reasonable width and height. We don't try to deserialize bitmaps
-// bigger than these dimensions. Arbitrarily chosen.
-constexpr int kMaxWidth = 32 * 1024;
-constexpr int kMaxHeight = 32 * 1024;
+// bigger than these dimensions.
+// These limits are fairly large to accommodate images from the largest possible
+// canvas.
+constexpr int kMaxWidth = 64 * 1024;
+constexpr int kMaxHeight = 64 * 1024;
 
 // A custom SkPixelRef subclass to wrap a BigBuffer storing the pixel data.
 class BigBufferPixelRef final : public SkPixelRef {

skia/public/mojom/test/mojom_traits_unittest.cc

@@ -87,7 +87,7 @@ TEST(StructTraitsTest, Bitmap) {
 
 TEST(StructTraitsTest, BitmapTooWideToSerialize) {
   SkBitmap input;
-  constexpr int kTooWide = 32 * 1024 + 1;
+  constexpr int kTooWide = 64 * 1024 + 1;
   input.allocPixels(
       SkImageInfo::MakeN32(kTooWide, 1, SkAlphaType::kUnpremul_SkAlphaType));
   input.eraseColor(SK_ColorYELLOW);
@@ -98,7 +98,7 @@ TEST(StructTraitsTest, BitmapTooWideToSerialize) {
 
 TEST(StructTraitsTest, BitmapTooTallToSerialize) {
   SkBitmap input;
-  constexpr int kTooTall = 32 * 1024 + 1;
+  constexpr int kTooTall = 64 * 1024 + 1;
   input.allocPixels(
       SkImageInfo::MakeN32(1, kTooTall, SkAlphaType::kUnpremul_SkAlphaType));
   input.eraseColor(SK_ColorYELLOW);