2 files changed, 7 insertions, 3 deletions
diff --git a/third_party/base/debug/alias.cc b/third_party/base/debug/alias.cc
index 3ab554fe48..6ee2ee9752 100644
--- a/third_party/base/debug/alias.cc
+++ b/third_party/base/debug/alias.cc
@@ -6,6 +6,7 @@
 
 #include "build/build_config.h"
 
+namespace pdfium {
 namespace base {
 namespace debug {
 
@@ -26,3 +27,4 @@ void Alias(const void* var) {
 
 }  // namespace debug
 }  // namespace base
+}  // namespace pdfium
diff --git a/third_party/base/debug/alias.h b/third_party/base/debug/alias.h
index 4d02e7af74..4fac6667b3 100644
--- a/third_party/base/debug/alias.h
+++ b/third_party/base/debug/alias.h
@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef BASE_DEBUG_ALIAS_H_
-#define BASE_DEBUG_ALIAS_H_
+#ifndef PDFIUM_THIRD_PARTY_BASE_DEBUG_ALIAS_H_
+#define PDFIUM_THIRD_PARTY_BASE_DEBUG_ALIAS_H_
 
+namespace pdfium {
 namespace base {
 namespace debug {
 
@@ -28,5 +29,6 @@ void Alias(const void* var);
 
 }  // namespace debug
 }  // namespace base
+}  // namespace pdfium
 
-#endif  // BASE_DEBUG_ALIAS_H_
+#endif  // PDFIUM_THIRD_PARTY_BASE_DEBUG_ALIAS_H_