base: Use stl utilities from the base namespace

base/debug/activity_analyzer.cc

Index: base/debug/activity_analyzer.cc
diff --git a/base/debug/activity_analyzer.cc b/base/debug/activity_analyzer.cc
index 3c4f80866d0afc21250ef5f20faf74585fdd53f0..438c24186f33ba871cdb53ea257c1cc5d3048585 100644
--- a/base/debug/activity_analyzer.cc
+++ b/base/debug/activity_analyzer.cc
@@ -119,7 +119,7 @@ void GlobalActivityAnalyzer::PrepareAllAnalyzers() {
 
     // Add this analyzer to the map of known ones, indexed by a unique thread
     // identifier.
-    DCHECK(!ContainsKey(analyzers_, analyzer->GetThreadKey()));
+    DCHECK(!base::ContainsKey(analyzers_, analyzer->GetThreadKey()));
     analyzer->allocator_reference_ = ref;
     analyzers_[analyzer->GetThreadKey()] = std::move(analyzer);
   }