Extracted media mime type checks from net/base/ into media/base/

chrome/browser/media_galleries/fileapi/supported_audio_video_checker.cc

Index: chrome/browser/media_galleries/fileapi/supported_audio_video_checker.cc
diff --git a/chrome/browser/media_galleries/fileapi/supported_audio_video_checker.cc b/chrome/browser/media_galleries/fileapi/supported_audio_video_checker.cc
index 6501064f4b408df3df8c8b1834658972fb6e9d27..8fdbf4f2daab1ea6ffda2e559b0f36497caea12b 100644
--- a/chrome/browser/media_galleries/fileapi/supported_audio_video_checker.cc
+++ b/chrome/browser/media_galleries/fileapi/supported_audio_video_checker.cc
@@ -14,6 +14,7 @@
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "chrome/browser/media_galleries/fileapi/safe_audio_video_checker.h"
+#include "content/common/mime_util.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/mime_util.h"
 
@@ -28,12 +29,12 @@ class SupportedAudioVideoExtensions {
     for (size_t i = 0; i < extensions.size(); ++i) {
       std::string mime_type;
       if (net::GetWellKnownMimeTypeFromExtension(extensions[i], &mime_type) &&
-          net::IsSupportedMimeType(mime_type)) {
+          content::IsSupportedMimeType(mime_type)) {
         audio_video_extensions_.insert(
             base::FilePath::kExtensionSeparator + extensions[i]);
       }
     }
-  };
+  }
 
   bool HasSupportedAudioVideoExtension(const base::FilePath& file) {
     return ContainsKey(audio_video_extensions_, file.Extension());