Fix a comment typo introduced in https://chromium-review.googlesource.com/c/chromium/src/+/2633748

Change-Id: I027a493f129021059ef8a7b51ca1d5bee01e65ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2635076
Commit-Queue: Nico Weber <thakis@chromium.org>
Commit-Queue: Dirk Pranke <dpranke@google.com>
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Cr-Commit-Position: refs/heads/master@{#844641}

content/shell/BUILD.gn

@@ -798,8 +798,8 @@ group("content_shell_crash_test") {
   ]
   if (is_mac && !use_system_xcode) {
     data += [
-      # Scripts call otool, which calls either a llvm-otool or otool-classic,
-      # so we all three.
+      # Scripts call otool, which calls either llvm-otool or otool-classic,
+      # so we need all three.
       # llvm-otool shells out to llvm-objdump, so that's needed as well.
       mac_bin_path + "llvm-objdump",
       mac_bin_path + "llvm-otool",