Adding a parameter that will be used to request a transparent doodle.

components/search_provider_logos/google_logo_api.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/search_provider_logos/google_logo_api.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/base64.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 
 namespace search_provider_logos {
 
 namespace {
 const char kResponsePreamble[] = ")]}'";
 }
 
 GURL GoogleAppendQueryparamsToLogoURL(const GURL& logo_url,
                                       const std::string& fingerprint,
-                                      bool wants_cta) {
+                                      bool wants_cta,
+                                      bool transparent) {
   // Note: we can't just use net::AppendQueryParameter() because it escapes
   // ":" to "%3A", but the server requires the colon not to be escaped.
   // See: http://crbug.com/413845
 
   // TODO(newt): Switch to using net::AppendQueryParameter once it no longer
   // escapes ":"
   if (!fingerprint.empty() || wants_cta) {
     std::string query(logo_url.query());
     if (!query.empty())
       query += "&";
 
     query += "async=";
-    if (!fingerprint.empty()) {
-      query += "es_dfp:" + fingerprint;
-      if (wants_cta)
-        query += ",";
-    }
-    if (wants_cta) {
-      query += "cta:1";
-    }
+    std::vector<std::string> params;
+    if (!fingerprint.empty())
+      params.push_back("es_dfp:" + fingerprint);
+
+    if (wants_cta)
+      params.push_back("cta:1");
+
+    if (transparent)
+      params.push_back("transp:1");
+
+    query += base::JoinString(params, ",");
     GURL::Replacements replacements;
     replacements.SetQueryStr(query);
     return logo_url.ReplaceComponents(replacements);
   }
 
   return logo_url;
 }
 
 std::unique_ptr<EncodedLogo> GoogleParseLogoResponse(
     const std::unique_ptr<std::string>& response,
@@ skipping 73 matching lines @@
     logo->metadata.can_show_after_expiration = true;
   }
   logo->metadata.expiration_time = response_time + time_to_live;
 
   // If this point is reached, parsing has succeeded.
   *parsing_failed = false;
   return logo;
 }
 
 }  // namespace search_provider_logos