Remove base::ScopedPtrHashMap from components/rappor/.

components/rappor/sampler.cc

Index: components/rappor/sampler.cc
diff --git a/components/rappor/sampler.cc b/components/rappor/sampler.cc
index b6a809807c8e0f65bb7403d02baee0d70abd1ab2..c334b40ff0d27d3425124af186c80218f9366086 100644
--- a/components/rappor/sampler.cc
+++ b/components/rappor/sampler.cc
@@ -24,7 +24,7 @@ void Sampler::AddSample(const std::string& metric_name,
   // Replace the previous sample with a 1 in sample_count_ chance so that each
   // sample has equal probability of being reported.
   if (base::RandGenerator(sample_counts_[metric_name]) == 0)
-    samples_.set(metric_name, std::move(sample));
+    samples_[metric_name] = std::move(sample);
 }
 
 void Sampler::ExportMetrics(const std::string& secret, RapporReports* reports) {