Use base::StringPairs where appropriate for src/media/

content/browser/media/encrypted_media_browsertest.cc

Index: content/browser/media/encrypted_media_browsertest.cc
diff --git a/content/browser/media/encrypted_media_browsertest.cc b/content/browser/media/encrypted_media_browsertest.cc
index c049d307cad0ed660ae081b4a75ee91734582dfc..41c3ff023f6a95430070190d0379aa9cf3a0b75e 100644
--- a/content/browser/media/encrypted_media_browsertest.cc
+++ b/content/browser/media/encrypted_media_browsertest.cc
@@ -80,7 +80,7 @@ class EncryptedMediaTest : public content::MediaBrowserTest,
       return;
     }
 
-    media::QueryParams query_params;
+    base::StringPairs query_params;
     query_params.push_back(std::make_pair("keySystem", CurrentKeySystem()));
     query_params.push_back(std::make_pair("runEncrypted", "1"));
     RunMediaTestPage("mse_config_change.html", query_params, kEnded, true);
@@ -97,7 +97,7 @@ class EncryptedMediaTest : public content::MediaBrowserTest,
       return;
     }
 
-    media::QueryParams query_params;
+    base::StringPairs query_params;
     query_params.push_back(std::make_pair("mediaFile", media_file));
     query_params.push_back(std::make_pair("mediaType", media_type));
     query_params.push_back(std::make_pair("keySystem", key_system));