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

content/browser/media/media_source_browsertest.cc

Index: content/browser/media/media_source_browsertest.cc
diff --git a/content/browser/media/media_source_browsertest.cc b/content/browser/media/media_source_browsertest.cc
index 90d0c84219fdb5774774c2a29656e3e62833809b..3b22bbf915f4ea6d861904e9233e18c8823d3c90 100644
--- a/content/browser/media/media_source_browsertest.cc
+++ b/content/browser/media/media_source_browsertest.cc
@@ -40,7 +40,7 @@ class MediaSourceTest : 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));
     RunMediaTestPage("media_source_player.html", query_params, expectation,
@@ -86,7 +86,7 @@ IN_PROC_BROWSER_TEST_F(MediaSourceTest, ConfigChangeVideo) {
     return;
   }
   RunMediaTestPage("mse_config_change.html",
-                   media::QueryParams(),
+                   base::StringPairs(),
                    kEnded,
                    true);
 }