Re-land: Switch GPU pixel tests to use cloud storage instead of the local disk.

scripts/slave/recipes/gpu/build_and_test.expected/mac_release_skip_checkout.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[DEPOT_TOOLS]/gclient.py",
       "runhooks"
     ],
     "env": {
       "GYP_DEFINES": "clang=1 component=static_library disable_glibcxx_debug=1 internal_gles2_conform_tests=1 target_arch=ia32",
@@ skipping 154 matching lines @@
       "--results-directory=[SLAVE_BUILD]/gtest-results/pixel_test",
       "--build-number=571",
       "--builder-name=TestBuilder",
       "--run-python-script",
       "[SLAVE_BUILD]/src/content/test/gpu/run_gpu_test",
       "pixel_test",
       "--show-stdout",
       "--output-format=gtest",
       "--browser=release",
       "-v",
-      "--generated-dir=[SLAVE_BUILD]/content_gpu_data/telemetry/generated",
-      "--reference-dir=[SLAVE_BUILD]/content_gpu_data/telemetry/reference",
-      "--build-revision=c14d891d44f0afff64e56ed7c9702df1d807b1ee"
+      "--build-revision",
+      "c14d891d44f0afff64e56ed7c9702df1d807b1ee",
+      "--upload-refimg-to-cloud-storage",
+      "--refimg-cloud-storage-bucket",
+      "chromium-gpu-archive/reference-images",
+      "--os-type",
+      "mac",
+      "--test-machine-name",
+      "TestBuilder"
     ],
     "name": "pixel_test"
   },
   {
     "always_run": true,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/chromium/archive_gpu_pixel_test_results.py",
       "--run-id",
@@ skipping 190 matching lines @@
       "--test-type=tab_capture_performance_tests",
       "performance_browser_tests",
       "--enable-gpu",
       "--test-launcher-jobs=1",
       "--test-launcher-print-test-stdio=always",
       "--gtest_filter=TabCapturePerformanceTest*"
     ],
     "name": "tab_capture_performance_tests"
   }
 ]