Make the launch params the default client behavior for UMA 3g

components/metrics/metrics_service.cc

Index: components/metrics/metrics_service.cc
diff --git a/components/metrics/metrics_service.cc b/components/metrics/metrics_service.cc
index 7e31ddb93156bf301ef333bd5cbe71bb7acc9691..071c96897103c1db2a9f4690cb6d6f6f616336c1 100644
--- a/components/metrics/metrics_service.cc
+++ b/components/metrics/metrics_service.cc
@@ -232,21 +232,6 @@ void MarkAppCleanShutdownAndCommit(CleanExitBeacon* clean_exit_beacon,
 }
 #endif  // defined(OS_ANDROID) || defined(OS_IOS)
 
-// Determines if current log should be sent based on sampling rate. Returns true
-// if the sampling rate is not set.
-bool ShouldUploadLog() {

[Alexei Svitkine (slow), 2016/05/13 21:11:56]

Nit: Can you remove some the includes needed for this now? e.g. variations
params API and maybe some of the ones below?

[gayane -on leave until 09-2017, 2016/05/16 15:33:04]

Done.

-  std::string probability_str = variations::GetVariationParamValue(
-      "UMA_EnableCellularLogUpload", "Sample_Probability");
-  if (probability_str.empty())
-    return true;
-
-  int probability;
-  // In case specified sampling rate is invalid.
-  if (!base::StringToInt(probability_str, &probability))
-    return true;
-  return base::RandInt(1, 100) <= probability;
-}
-
 }  // namespace
 
 // static
@@ -983,11 +968,6 @@ void MetricsService::SendStagedLog() {
   DCHECK(!log_upload_in_progress_);
   log_upload_in_progress_ = true;
 
-  if (!ShouldUploadLog()) {
-    SkipAndDiscardUpload();
-    return;
-  }
-
   if (!log_uploader_) {
     log_uploader_ = client_->CreateUploader(
         base::Bind(&MetricsService::OnLogUploadComplete,