Fix typos in comments.

chrome/BUILD.gn

Index: chrome/BUILD.gn
diff --git a/chrome/BUILD.gn b/chrome/BUILD.gn
index b2d01f34dc370be2638fee9ea3f06599e0b8276b..926b27743faedb1ff50b595e2245c869d14c3845 100644
--- a/chrome/BUILD.gn
+++ b/chrome/BUILD.gn
@@ -1071,7 +1071,7 @@ if (is_win) {
         "$root_out_dir/{{source_file_part}}-$chrome_version_full.breakpad",
       ]
 
-      # Use an aboslute path to dump_syms in case a user has it in their path.
+      # Use an absolute path to dump_syms in case a user has it in their path.
       args = rebase_path(outputs, root_out_dir) + [
                rebase_path("$root_out_dir/dump_syms"),
                "-g",
@@ -1094,8 +1094,8 @@ if (is_win) {
       script = "//chrome/tools/build/mac/archive_symbols.py"
 
       # These are the dSYMs that will be archived. The sources list must be
-      # are the target outputs that correspond to the dSYMs (since a dSYM is
-      # a directory it cannot be listed as a source file). The targets that
+      # the target outputs that correspond to the dSYMs (since a dSYM is a
+      # directory it cannot be listed as a source file). The targets that
       # generate both the dSYM and binary image are listed in deps.
       _dsyms = [
         "$root_out_dir/$chrome_framework_name.dSYM",