linux: use /proc/self/exe when exec'ing ourselves

chrome/test/chrome_process_util.cc

Index: chrome/test/chrome_process_util.cc
diff --git a/chrome/test/chrome_process_util.cc b/chrome/test/chrome_process_util.cc
index f53cbbd6f908a837dfbcfccf6df21c49df04ff89..fea1d0efc93b089ad63ec4a2086421e8966872bf 100644
--- a/chrome/test/chrome_process_util.cc
+++ b/chrome/test/chrome_process_util.cc
@@ -100,9 +100,10 @@ ChromeProcessList GetRunningChromeProcesses(const FilePath& data_dir) {
   }
 #endif  // defined(OS_LINUX)
 
-#if defined(OS_MACOSX)
-  // On Mac OS X we run the subprocesses with a different bundle, so they end
-  // up with a different name, so we have to collect them in a second pass.
+#if defined(OS_LINUX) || defined(OS_MACOSX)
+  // On Mac OS X we run the subprocesses with a different bundle, and
+  // on Linux via /proc/self/exe, so they end up with a different
+  // name.  We must collect them in a second pass.
   {
     ChildProcessFilter filter(browser_pid);
     base::NamedProcessIterator it(chrome::kHelperProcessExecutableName,