Add HistogramTester::GetAllSamples.

base/test/histogram_tester.h

Index: base/test/histogram_tester.h
diff --git a/base/test/histogram_tester.h b/base/test/histogram_tester.h
index 96317f98d2d33283ed09a8d3e69487312af1dd38..d06efcdaf26f4547c8fc7c27f7901344ca71a755 100644
--- a/base/test/histogram_tester.h
+++ b/base/test/histogram_tester.h
@@ -7,6 +7,8 @@
 
 #include <map>
 #include <string>
+#include <utility>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
@@ -47,6 +49,12 @@ class HistogramTester {
   void ExpectTotalCount(const std::string& name,
                         base::HistogramBase::Count count) const;
 
+  // Returns a list of all of the buckets recorded since creation of this
+  // object, as pair<Sample, Count>, where the Sample is the min boundary of the
+  // bucket and the Count is the count recorded since creation.

[ncarter (slow), 2015/06/24 17:28:44]

This comment should have code showing the example usage, including the
EXPECT_THAT() and the testing::ElementsAre. Even when I'm looking at the gmock
docs, it's pretty mystifying to figure out how to get these to work from first
principles.

[twifkak, 2015/06/25 20:21:38]

Done.

+  std::vector<std::pair<HistogramBase::Sample, HistogramBase::Count>>
+  GetAllSamples(const std::string& name);
+
   // Access a modified HistogramSamples containing only what has been logged
   // to the histogram since the creation of this object.
   scoped_ptr<HistogramSamples> GetHistogramSamplesSinceCreation(