Histograms - Support histograms for Plugins, GPU

base/metrics/histogram_sender.h

Index: base/metrics/histogram_sender.h
===================================================================
--- base/metrics/histogram_sender.h	(working copy)
+++ base/metrics/histogram_sender.h	(working copy)
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_COMMON_METRICS_HISTOGRAM_SENDER_H_
-#define CHROME_COMMON_METRICS_HISTOGRAM_SENDER_H_
+#ifndef BASE_METRICS_HISTOGRAM_SENDER_H_
+#define BASE_METRICS_HISTOGRAM_SENDER_H_
 #pragma once
 
 #include <map>
@@ -13,6 +13,8 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
 
+namespace base {
+
 // HistogramSender handles the logistics of gathering up available histograms

[jam, 2012/06/01 18:23:23]

it's a little odd that this class is called HistogramSender, but it doesn't send
them. maybe HistogramFlattener?

[ramant (doing other things), 2012/06/07 02:04:41]

Done.

 // for transmission (such as from renderer to browser, or from browser to UMA
 // upload).  It has several pure virtual functions that are replaced in
@@ -22,7 +24,11 @@
 // corruption, this class also validates as much rendundancy as it can before
 // calling for the marginal change (a.k.a., delta) in a histogram to be sent
 // onward.
-class HistogramSender {
+class BASE_EXPORT HistogramSender {
+ public:
+  // Send the histogram data from renderer or child processes.
+  virtual void SendHistograms(int sequence_number) = 0;
+
  protected:
   HistogramSender();
   virtual ~HistogramSender();
@@ -64,4 +70,6 @@
   DISALLOW_COPY_AND_ASSIGN(HistogramSender);
 };
 
-#endif  // CHROME_COMMON_METRICS_HISTOGRAM_SENDER_H_
+}  // namespace base
+
+#endif  // BASE_METRICS_HISTOGRAM_SENDER_H_