Move LowerCaseEqualsASCII to base namespace

components/metrics/serialization/serialization_utils.cc

Index: components/metrics/serialization/serialization_utils.cc
diff --git a/components/metrics/serialization/serialization_utils.cc b/components/metrics/serialization/serialization_utils.cc
index 11f45a6661eb740c528d84b3de2c3e183af26ed0..940729db2849c2d1877fb42f557177920e2600b3 100644
--- a/components/metrics/serialization/serialization_utils.cc
+++ b/components/metrics/serialization/serialization_utils.cc
@@ -97,15 +97,15 @@ scoped_ptr<MetricSample> SerializationUtils::ParseSample(
   const std::string& name = parts[0];
   const std::string& value = parts[1];
 
-  if (LowerCaseEqualsASCII(name, "crash")) {
+  if (base::LowerCaseEqualsASCII(name, "crash")) {
     return MetricSample::CrashSample(value);
-  } else if (LowerCaseEqualsASCII(name, "histogram")) {
+  } else if (base::LowerCaseEqualsASCII(name, "histogram")) {
     return MetricSample::ParseHistogram(value);
-  } else if (LowerCaseEqualsASCII(name, "linearhistogram")) {
+  } else if (base::LowerCaseEqualsASCII(name, "linearhistogram")) {
     return MetricSample::ParseLinearHistogram(value);
-  } else if (LowerCaseEqualsASCII(name, "sparsehistogram")) {
+  } else if (base::LowerCaseEqualsASCII(name, "sparsehistogram")) {
     return MetricSample::ParseSparseHistogram(value);
-  } else if (LowerCaseEqualsASCII(name, "useraction")) {
+  } else if (base::LowerCaseEqualsASCII(name, "useraction")) {
     return MetricSample::UserActionSample(value);
   } else {
     DLOG(ERROR) << "invalid event type: " << name << ", value: " << value;