Fix that kUseANGLE is not recognized by chromeos

Previously, '--use-angle=gles' was not recoginzed by chromeos. If call
'command_line->GetSwitchValueASCII(switches::kUseANGLE)', it will return ''.
This patch makes it get correct value.

Bug: 1093720
Change-Id: I51dd57be40206c3c2b077c22241283da98d45f9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2241292Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Jiajia Qin <jiajia.qin@intel.com>
Cr-Commit-Position: refs/heads/master@{#779707}

chrome/browser/chromeos/login/chrome_restart_request.cc

@@ -95,6 +95,7 @@ void DeriveCommandLine(const GURL& start_url,
     ::switches::kDisableGpuMemoryBufferVideoFrames,
     ::switches::kDisableGpuShaderDiskCache,
     ::switches::kUseCmdDecoder,
+    ::switches::kUseANGLE,
     ::switches::kDisableGpuWatchdog,
     ::switches::kDisableGpuCompositing,
     ::switches::kDisableGpuRasterization,