Use mojo typemap to simplify the code using DmabufPlane

chrome/gpu/arc_gpu_video_decode_accelerator.cc

Index: chrome/gpu/arc_gpu_video_decode_accelerator.cc
diff --git a/chrome/gpu/arc_gpu_video_decode_accelerator.cc b/chrome/gpu/arc_gpu_video_decode_accelerator.cc
index aa22e34b2109c9fce9607a503665a0c4a128194b..32e7ad7f38be370e4145078460769e8ee1449f6f 100644
--- a/chrome/gpu/arc_gpu_video_decode_accelerator.cc
+++ b/chrome/gpu/arc_gpu_video_decode_accelerator.cc
@@ -198,7 +198,8 @@ void ArcGpuVideoDecodeAccelerator::BindSharedMemory(PortType port,
 
 bool ArcGpuVideoDecodeAccelerator::VerifyDmabuf(
     const base::ScopedFD& dmabuf_fd,
-    const std::vector<DmabufPlane>& dmabuf_planes) const {
+    const std::vector<::arc::ArcVideoAcceleratorDmabufPlane>& dmabuf_planes)
+    const {
   size_t num_planes = media::VideoFrame::NumPlanes(output_pixel_format_);
   if (dmabuf_planes.size() != num_planes) {
     DLOG(ERROR) << "Invalid number of dmabuf planes passed: "
@@ -221,7 +222,7 @@ bool ArcGpuVideoDecodeAccelerator::VerifyDmabuf(
     size_t rows =
         media::VideoFrame::Rows(i, output_pixel_format_, coded_size_.height());
     base::CheckedNumeric<off_t> current_size(plane.offset);
-    current_size += plane.stride * rows;
+    current_size += base::CheckMul(plane.stride, rows);
 
     if (!current_size.IsValid() || current_size.ValueOrDie() > size) {
       DLOG(ERROR) << "Invalid strides/offsets";
@@ -238,7 +239,7 @@ void ArcGpuVideoDecodeAccelerator::BindDmabuf(
     PortType port,
     uint32_t index,
     base::ScopedFD dmabuf_fd,
-    const std::vector<DmabufPlane>& dmabuf_planes) {
+    const std::vector<::arc::ArcVideoAcceleratorDmabufPlane>& dmabuf_planes) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (!vda_) {