chrome: Add out-of-line copy ctors for complex classes.

chrome/browser/devtools/devtools_network_interceptor.h

Index: chrome/browser/devtools/devtools_network_interceptor.h
diff --git a/chrome/browser/devtools/devtools_network_interceptor.h b/chrome/browser/devtools/devtools_network_interceptor.h
index 1b8976bd0f207cdcc7fbb682ead0ea2280bcc96f..05eaa67e9c3752f21f416be14f142d7cea3a0548 100644
--- a/chrome/browser/devtools/devtools_network_interceptor.h
+++ b/chrome/browser/devtools/devtools_network_interceptor.h
@@ -52,6 +52,7 @@ class DevToolsNetworkInterceptor {
   struct ThrottleRecord {
    public:
     ThrottleRecord();
+    ThrottleRecord(const ThrottleRecord& other);
     ~ThrottleRecord();
     int result;
     int64_t bytes;