Revert "Only pass executable sections to OnDllLoaded for patching"

This reverts commit df9e203.

Reason for revert: Suspected culprit of tree closer on win-asan: https://ci.chromium.org/p/chromium/builders/ci/win32-archive-rel/17873?

Original change's description:
> Only pass executable sections to OnDllLoaded for patching
>
> On recent Windows insider builds GetModuleHandleExW loads sections for
> inspection as non-executable images, rather than as files. This leads
> to our hooks detecting the SEC_IMAGE attribute and potentially patching
> functions (e.g. for user32.dll).
>
> This caused content_browsertests to fail as it pinned user32.dll in some
> processes. With this change, the tests run again.
>
> See crbug.com/1143397 for a full discussion.
>
> Bug: 1143397
> Change-Id: I3b75464d0442160a417e4cb7084306841aaf76f7
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2511531
> Reviewed-by: Will Harris <wfh@chromium.org>
> Commit-Queue: Alex Gough <ajgo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#823354}

TBR=wfh@chromium.org,ajgo@chromium.org

Change-Id: Ia164ea218daf7771f025dfa57a3a4bf25c41eac2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1143397
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2515501
Reviewed-by: Meredith Lane <meredithl@chromium.org>
Commit-Queue: Meredith Lane <meredithl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823372}

sandbox/win/src/sandbox_nt_util.cc

@@ -404,20 +404,6 @@ bool IsValidImageSection(HANDLE section,
   if (!(basic_info.Attributes & SEC_IMAGE))
     return false;
 
-  // Windows 10 2009+ may open PEs as SEC_IMAGE_NO_EXECUTE in non-dll-loading
-  // paths which looks identical to dll-loading unless we check if the section
-  // handle has execute rights.
-  OBJECT_BASIC_INFORMATION obj_info;
-  ULONG obj_size_returned;
-  ret = g_nt.QueryObject(section, ObjectBasicInformation, &obj_info,
-                         sizeof(obj_info), &obj_size_returned);
-
-  if (!NT_SUCCESS(ret) || sizeof(obj_info) != obj_size_returned)
-    return false;
-
-  if (!(obj_info.GrantedAccess & SECTION_MAP_EXECUTE))
-    return false;
-
   return true;
 }