Revert of Update SplitString calls to new form (patchset #5 id:80001 of https://codereview.chromium.org/1272823003/ )

Reason for revert:
Caused Blink layout test failures in media/encrypted-media/encrypted-media-requestmediakeysystemaccess.html :

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#showExpectations=true&tests=media%2Fencrypted-media%2Fencrypted-media-requestmediakeysystemaccess.html

Original issue's description:
> Update SplitString calls to new form
>
> Uses the new form for most (but not quite all) of the remaining users of the old form.
>
> Changes media mime util codec list parsing to expect no result from the string "," rather than two empty strings. The old SplitString call had a special case where if the input was empty, it would return empty, but if it had one split character, it would return two empty strings as results.
>
> The new one lets you choose but the options are either (1) empty string -> one empty string and "," -> two empty strings, or (2) map both to no results for when you don't want empty results. I'm pretty sure media codec parsing actually wants the latter behavior, so I updated the call to discard empty results and MimeUtilTest.ParseCodecString is updated.
>
> Committed: https://crrev.com/0aa7c64253cca8b636d52d1d01d94f96ab9c13fa
> Cr-Commit-Position: refs/heads/master@{#342238}

TBR=sky@chromium.org,dalecurtis@chromium.org,brettw@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1278973003

Cr-Commit-Position: refs/heads/master@{#342257}

1 files changed, 2 insertions, 3 deletions

diff --git a/base/command_line.cc b/base/command_line.cc
index 95ff644..3fcf22a 100644
--- a/base/command_line.cc
+++ b/base/command_line.cc
@@ -394,9 +394,8 @@ void CommandLine::PrependWrapper(const CommandLine::StringType& wrapper) {
     return;
   // The wrapper may have embedded arguments (like "gdb --args"). In this case,
   // we don't pretend to do anything fancy, we just split on spaces.
-  StringVector wrapper_argv = SplitString(
-      wrapper, FilePath::StringType(1, ' '), base::TRIM_WHITESPACE,
-      base::SPLIT_WANT_ALL);
+  StringVector wrapper_argv;
+  SplitString(wrapper, FILE_PATH_LITERAL(' '), &wrapper_argv);
   // Prepend the wrapper and update the switches/arguments |begin_args_|.
   argv_.insert(argv_.begin(), wrapper_argv.begin(), wrapper_argv.end());
   begin_args_ += wrapper_argv.size();