Convert miscellaneous RenderThreadImpl messages to mojom

mojo/public/tools/bindings/chromium_bindings_configuration.gni

Index: mojo/public/tools/bindings/chromium_bindings_configuration.gni
diff --git a/mojo/public/tools/bindings/chromium_bindings_configuration.gni b/mojo/public/tools/bindings/chromium_bindings_configuration.gni
index d8cc54de6b59dd8452fb338423166f56d691823f..ce0a11c07001c782002ebf7cdb7babdde53056b6 100644
--- a/mojo/public/tools/bindings/chromium_bindings_configuration.gni
+++ b/mojo/public/tools/bindings/chromium_bindings_configuration.gni
@@ -30,8 +30,10 @@ _typemap_imports = [
   "//ui/gfx/typemaps.gni",
   "//url/mojo/typemaps.gni",
 ]
-_typemaps = []
 
+_typemap_imports_mac = [ "//content/common/typemaps_mac.gni" ]
+
+_typemaps = []
 foreach(typemap_import, _typemap_imports) {
   # Avoid reassignment error by assigning to empty scope first.
   _imported = {
@@ -44,3 +46,16 @@ typemaps = []
 foreach(typemap, _typemaps) {
   typemaps += [ read_file(typemap, "scope") ]
 }
+
+_typemaps_mac = []
+foreach(typemap_import, _typemap_imports_mac) {
+  _imported = {
+  }
+  _imported = read_file(typemap_import, "scope")
+  _typemaps_mac += _imported.typemaps
+}
+
+typemaps_mac = []
+foreach(typemap, _typemaps_mac) {
+  typemaps_mac += [ read_file(typemap, "scope") ]
+}