Generate param traits size methods for IPC files in chrome/ (and traits it depends on).

chrome/common/content_settings_pattern_serializer.cc

Index: chrome/common/content_settings_pattern_serializer.cc
diff --git a/chrome/common/content_settings_pattern_serializer.cc b/chrome/common/content_settings_pattern_serializer.cc
index 2e1ba34783a022c72bd8208b095eeeddfacf027f..1f8045aac98fa600947cc04d34eeefc63af6d2cb 100644
--- a/chrome/common/content_settings_pattern_serializer.cc
+++ b/chrome/common/content_settings_pattern_serializer.cc
@@ -8,6 +8,13 @@
 #include "components/content_settings/core/common/content_settings_pattern.h"
 
 // static
+void ContentSettingsPatternSerializer::GetSize(
+    const ContentSettingsPattern& pattern, base::PickleSizer* s) {
+  IPC::GetParamSize(s, pattern.is_valid_);
+  IPC::GetParamSize(s, pattern.parts_);
+}
+
+// static
 void ContentSettingsPatternSerializer::WriteToMessage(
     const ContentSettingsPattern& pattern,
     base::Pickle* m) {