Always use a /prefetch:# switch when launching a process on Windows.

components/crash.gypi

Index: components/crash.gypi
diff --git a/components/crash.gypi b/components/crash.gypi
index 84eb1488fcd9d4ccbd0592074733e429eb184517..7b154b3febe02a720eda0e662a5a4d287bbc1de9 100644
--- a/components/crash.gypi
+++ b/components/crash.gypi
@@ -224,13 +224,6 @@
             '../third_party/kasko/kasko.gyp:kasko',
           ],
           'conditions': [
-            ['OS=="win"', {
-              'dependencies': [
-                # TODO(fdoray): Remove this once the PreRead field trial has
-                # expired. crbug.com/577698
-                '<(DEPTH)/components/components.gyp:startup_metric_utils_win',
-              ],
-            }],
             ['OS=="mac" or OS=="win"', {
               'dependencies': [
                 '../third_party/crashpad/crashpad/client/client.gyp:crashpad_client',