Add a size parameter to SharedMemoryHandle.

base/memory/shared_memory_handle_posix.cc

Index: base/memory/shared_memory_handle_posix.cc
diff --git a/base/memory/shared_memory_handle_posix.cc b/base/memory/shared_memory_handle_posix.cc
index b97455962521fd42f561152c935483c91eef429c..09dfb9ca8b1510ab79320b91e5229a1590617d4c 100644
--- a/base/memory/shared_memory_handle_posix.cc
+++ b/base/memory/shared_memory_handle_posix.cc
@@ -16,15 +16,17 @@ SharedMemoryHandle::SharedMemoryHandle() = default;
 
 SharedMemoryHandle::SharedMemoryHandle(
     const base::FileDescriptor& file_descriptor,
+    size_t size,
     const base::UnguessableToken& guid)
-    : file_descriptor_(file_descriptor), guid_(guid) {}
+    : file_descriptor_(file_descriptor), guid_(guid), size_(size) {}
 
 // static
-SharedMemoryHandle SharedMemoryHandle::ImportHandle(int fd) {
+SharedMemoryHandle SharedMemoryHandle::ImportHandle(int fd, size_t size) {
   SharedMemoryHandle handle;
   handle.file_descriptor_.fd = fd;
   handle.file_descriptor_.auto_close = false;
   handle.guid_ = UnguessableToken::Create();
+  handle.size_ = size;
   return handle;
 }
 
@@ -32,10 +34,6 @@ int SharedMemoryHandle::GetHandle() const {
   return file_descriptor_.fd;
 }
 
-void SharedMemoryHandle::SetHandle(int handle) {
-  file_descriptor_.fd = handle;
-}
-
 bool SharedMemoryHandle::IsValid() const {
   return file_descriptor_.fd >= 0;
 }
@@ -58,7 +56,8 @@ SharedMemoryHandle SharedMemoryHandle::Duplicate() const {
   int duped_handle = HANDLE_EINTR(dup(file_descriptor_.fd));
   if (duped_handle < 0)
     return SharedMemoryHandle();
-  return SharedMemoryHandle(FileDescriptor(duped_handle, true), GetGUID());
+  return SharedMemoryHandle(FileDescriptor(duped_handle, true), GetSize(),
+                            GetGUID());
 }
 
 void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) {