FBTF: Moves code to the headers.

net/base/host_resolver.h

Index: net/base/host_resolver.h
diff --git a/net/base/host_resolver.h b/net/base/host_resolver.h
index 58ea8bd03bf3e15956ce4a38a838326e02181c37..1c0982d8efc979b94c2b186e8d830e1034629c09 100644
--- a/net/base/host_resolver.h
+++ b/net/base/host_resolver.h
@@ -176,12 +176,12 @@ class HostResolver : public base::RefCounted<HostResolver> {
  protected:
   friend class base::RefCounted<HostResolver>;
 
-  HostResolver() { }
+  HostResolver();
 
   // If any completion callbacks are pending when the resolver is destroyed,
   // the host resolutions are cancelled, and the completion callbacks will not
   // be called.
-  virtual ~HostResolver() {}
+  virtual ~HostResolver();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(HostResolver);