Mojo: NULL -> nullptr in mojo/public/cpp/bindings and also for the bindings generator.

mojo/public/cpp/bindings/tests/string_unittest.cc

Index: mojo/public/cpp/bindings/tests/string_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/string_unittest.cc b/mojo/public/cpp/bindings/tests/string_unittest.cc
index 9844ee9fca1d09ac2757788b03eb82036c6e0e0f..6f8544363ad49886d4981ec1d1443470816ab562 100644
--- a/mojo/public/cpp/bindings/tests/string_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/string_unittest.cc
@@ -14,12 +14,12 @@ TEST(StringTest, DefaultIsNull) {
 }
 
 TEST(StringTest, ConstructedWithNULL) {
-  String s(NULL);
+  String s(nullptr);
   EXPECT_TRUE(s.is_null());
 }
 
 TEST(StringTest, ConstructedWithNullCharPointer) {
-  const char* null = NULL;
+  const char* null = nullptr;
   String s(null);
   EXPECT_TRUE(s.is_null());
 }
@@ -27,7 +27,7 @@ TEST(StringTest, ConstructedWithNullCharPointer) {
 TEST(StringTest, AssignedNULL) {
   String s("");
   EXPECT_FALSE(s.is_null());
-  s = NULL;
+  s = nullptr;
   EXPECT_TRUE(s.is_null());
 }