Enable UMA log uploads for cellular networks.

components/metrics/metrics_reporting_scheduler.h

Index: components/metrics/metrics_reporting_scheduler.h
diff --git a/components/metrics/metrics_reporting_scheduler.h b/components/metrics/metrics_reporting_scheduler.h
index 19f07570663727eb2c8c259b91fb073fd0477e8d..9053ba51bf61168d2765a43bd05bed0a36018c8c 100644
--- a/components/metrics/metrics_reporting_scheduler.h
+++ b/components/metrics/metrics_reporting_scheduler.h
@@ -10,13 +10,16 @@
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
+#include "components/metrics/net/network_metrics_provider.h"
 
 namespace metrics {
 
 // Scheduler task to drive a MetricsService object's uploading.
 class MetricsReportingScheduler {
  public:
-  explicit MetricsReportingScheduler(const base::Closure& upload_callback);
+  explicit MetricsReportingScheduler(

[Alexei Svitkine (slow), 2015/02/17 20:50:04]

Nit: Remove explicit since there's two params. Add a comment explaining the
params.

[gayane -on leave until 09-2017, 2015/02/18 00:30:35]

Done.

+      const base::Closure& upload_callback,
+      const base::Closure& is_cellular_connection_func);

[Alexei Svitkine (slow), 2015/02/17 20:50:04]

Nit: func -> callback

[gayane -on leave until 09-2017, 2015/02/18 00:30:35]

Done.

   ~MetricsReportingScheduler();
 
   // Starts scheduling uploads. This in a no-op if the scheduler is already
@@ -39,6 +42,9 @@ class MetricsReportingScheduler {
   // Sets the upload interval to a specific value, exposed for unit tests.
   void SetUploadIntervalForTesting(base::TimeDelta interval);
 
+  // Sets whether the network connection is cellular or not.
+  void SetConnectionType(bool is_cellular);
+
  private:
   // Timer callback indicating it's time for the MetricsService to upload
   // metrics.
@@ -57,6 +63,10 @@ class MetricsReportingScheduler {
   // (bug: 17391128). Should be removed once the experiments are done.
   base::TimeDelta GetStandardUploadInterval();
 
+  // Returns true if the user is assigned to the experiment group for enabled
+  // cellular uploads.
+  bool IsCellularEnabledByExperiment();
+
   // The MetricsService method to call when uploading should happen.
   const base::Closure upload_callback_;
 
@@ -84,6 +94,13 @@ class MetricsReportingScheduler {
   // has been completed.
   bool waiting_for_init_task_complete_;
 
+  // Pointer to |MetricsServcie::IsCellularConnection| function.

[Alexei Svitkine (slow), 2015/02/17 20:50:04]

Can you explain instead what the callback does?

[gayane -on leave until 09-2017, 2015/02/18 00:30:35]

Done.

+  base::Closure update_connection_type_func_;
+
+  // Indicates whether network connection is cellular or not.
+  // Default value is |true| because cellular mode is more conservative.
+  bool is_cellular_connection_;
+
   DISALLOW_COPY_AND_ASSIGN(MetricsReportingScheduler);
 };