Revert of Move pref and switch in preparation for metrics componentization (patchset #2 id:20001 of https://codereview.chromium.org/1373823002/ )

Reason for revert:
Build Failure:
http://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux/builds/42687

Original issue's description:
> Move pref and switch in preparation for metrics componentization
>
> Code will shortly be componentized into the metrics component that uses
> prefs::kMetricsReportingEnabled and switches::kForceFieldTrials. To enable that
> componentization, this CL does the following:
>
> - Moves prefs::kMetricsReportingEnabled into the metrics component.
> - Moves switches:kForceFieldTrials from //content to //base to enable it to be
>   used both by //content and by the metrics component.
>
> BUG=508014
>
> Committed: https://crrev.com/71f7da5a323ce64e8bc5b3ff2a62fc60e3c71bd0
> Cr-Commit-Position: refs/heads/master@{#351268}

TBR=asvitkine@chromium.org,jam@chromium.org,thestig@chromium.org,blundell@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=508014

Review URL: https://codereview.chromium.org/1374873002

Cr-Commit-Position: refs/heads/master@{#351270}

1 files changed, 0 insertions, 10 deletions

diff --git a/base/base_switches.cc b/base/base_switches.cc
index 76827b8..7f3be7f 100644
--- a/base/base_switches.cc
+++ b/base/base_switches.cc
@@ -23,16 +23,6 @@ const char kEnableLowEndDeviceMode[]        = "enable-low-end-device-mode";
 // Force disabling of low-end device mode when set.
 const char kDisableLowEndDeviceMode[]       = "disable-low-end-device-mode";
 
-// This option can be used to force field trials when testing changes locally.
-// The argument is a list of name and value pairs, separated by slashes. If a
-// trial name is prefixed with an asterisk, that trial will start activated.
-// For example, the following argument defines two trials, with the second one
-// activated: "GoogleNow/Enable/*MaterialDesignNTP/Default/" This option can
-// also be used by the browser process to send the list of trials to a
-// non-browser process, using the same format. See
-// FieldTrialList::CreateTrialsFromString() in field_trial.h for details.
-const char kForceFieldTrials[]              = "force-fieldtrials";
-
 // Suppresses all error dialogs when present.
 const char kNoErrorDialogs[]                = "noerrdialogs";