Eliminate third_party/mojo/src from all targets' include paths

third_party/mojo/src/mojo/public/cpp/bindings/lib/union_accessor.h

Index: third_party/mojo/src/mojo/public/cpp/bindings/lib/union_accessor.h
diff --git a/third_party/mojo/src/mojo/public/cpp/bindings/lib/union_accessor.h b/third_party/mojo/src/mojo/public/cpp/bindings/lib/union_accessor.h
index 821aede5953c3715199d791c266b984331fd3b22..54ad2f8d92baac26b14d07f2a3a786dac4c48a04 100644
--- a/third_party/mojo/src/mojo/public/cpp/bindings/lib/union_accessor.h
+++ b/third_party/mojo/src/mojo/public/cpp/bindings/lib/union_accessor.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
-#define MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
+#ifndef THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
+#define THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
 
 namespace mojo {
 namespace internal {
@@ -30,4 +30,4 @@ class UnionAccessor {
 }  // namespace internal
 }  // namespace mojo
 
-#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_
+#endif  // THIRD_PARTY_MOJO_SRC_MOJO_PUBLIC_CPP_BINDINGS_LIB_UNION_ACCESSOR_H_