[mojo-edk] Explicitly serialise HANDLEs into messages instead of PlatformHandles.

mojo/edk/system/channel_win.cc

Index: mojo/edk/system/channel_win.cc
diff --git a/mojo/edk/system/channel_win.cc b/mojo/edk/system/channel_win.cc
index 38744ab99b16e424daf497b24695fc17469c1e0b..cbd9a3c2c28788f79da02881222d64dce0f703f9 100644
--- a/mojo/edk/system/channel_win.cc
+++ b/mojo/edk/system/channel_win.cc
@@ -121,12 +121,15 @@ class ChannelWin : public Channel,
       ScopedPlatformHandleVectorPtr* handles) override {
     if (num_handles > std::numeric_limits<uint16_t>::max())
       return false;
-    size_t handles_size = sizeof(PlatformHandle) * num_handles;
+    size_t handles_size = sizeof(HANDLE) * num_handles;
     if (handles_size > extra_header_size)
       return false;
     DCHECK(extra_header);
     handles->reset(new PlatformHandleVector(num_handles));
-    memcpy((*handles)->data(), extra_header, handles_size);
+    const HANDLE* extra_header_handles =
+        reinterpret_cast<const HANDLE*>(extra_header);
+    for (size_t i = 0; i < num_handles; i++)
+      (*handles)->at(i).handle = extra_header_handles[i];
     return true;
   }