chrome: Use stl utilities from the base namespace

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index dd0f063f6af5ccb9830cd4a2e1d733384018f5d2..cb2a6b8d7a96780bdb162bba789c606d753a1618 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -817,7 +817,7 @@ net::URLRequestContext* ProfileIOData::GetIsolatedAppRequestContext(
     content::URLRequestInterceptorScopedVector request_interceptors) const {
   DCHECK(initialized_);
   net::URLRequestContext* context = NULL;
-  if (ContainsKey(app_request_context_map_, partition_descriptor)) {
+  if (base::ContainsKey(app_request_context_map_, partition_descriptor)) {
     context = app_request_context_map_[partition_descriptor];
   } else {
     context = AcquireIsolatedAppRequestContext(
@@ -835,7 +835,8 @@ net::URLRequestContext* ProfileIOData::GetIsolatedMediaRequestContext(
     const StoragePartitionDescriptor& partition_descriptor) const {
   DCHECK(initialized_);
   net::URLRequestContext* context = NULL;
-  if (ContainsKey(isolated_media_request_context_map_, partition_descriptor)) {
+  if (base::ContainsKey(isolated_media_request_context_map_,
+                        partition_descriptor)) {
     context = isolated_media_request_context_map_[partition_descriptor];
   } else {
     context = AcquireIsolatedMediaRequestContext(app_context,