[Fuchsia] Don't pass --disable-gpu to webrunner context process

Previously --disable-gpu process was passed to context process
to prevent it from starting GPU process. It no longer disables
GPU process, but GPU process should not crash once
https://crrev.com/r/1178754 lands.

Bug: 867052, 874533
Change-Id: If2baf7aa50dd9ccb6ee5442d079f50c1908ed72c
Reviewed-on: https://chromium-review.googlesource.com/1178881
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584794}

webrunner/service/context_provider_impl.cc

@@ -20,7 +20,6 @@
 #include "base/fuchsia/fuchsia_logging.h"
 #include "base/logging.h"
 #include "base/process/launch.h"
-#include "content/public/common/content_switches.h"
 #include "webrunner/service/common.h"
 
 namespace webrunner {
@@ -29,11 +28,7 @@ namespace {
 // Relaunches the current executable as a Context process.
 base::Process LaunchContextProcess(const base::CommandLine& launch_command,
                                    const base::LaunchOptions& launch_options) {
-  base::CommandLine launch_command_modified = launch_command;
-
-  // TODO(crbug.com/867052): Remove this flag when GPU process works on Fuchsia.
-  launch_command_modified.AppendSwitch(switches::kDisableGpu);
-  return base::LaunchProcess(launch_command_modified, launch_options);
+  return base::LaunchProcess(launch_command, launch_options);
 }
 
 }  // namespace