Expose data reduction proxy auth token for internal builds.

google_apis/google_api_keys.cc

Index: google_apis/google_api_keys.cc
diff --git a/google_apis/google_api_keys.cc b/google_apis/google_api_keys.cc
index f879979bc78a49baafabf0ac192f96bb68c95ea0..fc8484a676e8619adac6baa71386a77158033ccd 100644
--- a/google_apis/google_api_keys.cc
+++ b/google_apis/google_api_keys.cc
@@ -180,6 +180,13 @@ class APIKeyCache {
     return client_secrets_[client];
   }
 
+  std::string GetSpdyProxyAuthValue() {
+#if defined(SPDY_PROXY_AUTH_VALUE)
+    return SPDY_PROXY_AUTH_VALUE;
+#endif
+    return std::string();
+  }
+
  private:
   // Gets a value for a key.  In priority order, this will be the value
   // provided via a command-line switch, the value provided via an
@@ -260,6 +267,10 @@ std::string GetOAuth2ClientSecret(OAuth2Client client) {
   return g_api_key_cache.Get().GetClientSecret(client);
 }
 
+std::string GetSpdyProxyAuthValue() {
+  return g_api_key_cache.Get().GetSpdyProxyAuthValue();
+}
+
 bool IsGoogleChromeAPIKeyUsed() {
 #if defined(GOOGLE_CHROME_BUILD) || defined(USE_OFFICIAL_GOOGLE_API_KEYS)
   return true;