Deinline even more destructors.

BUG=none
TEST=compiles

Review URL: http://codereview.chromium.org/5794003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69084 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/dom_ui/fileicon_source.cc b/chrome/browser/dom_ui/fileicon_source.cc
index 7572cdc..a720df8 100644
--- a/chrome/browser/dom_ui/fileicon_source.cc
+++ b/chrome/browser/dom_ui/fileicon_source.cc
@@ -59,6 +59,11 @@
   }
 }
 
+std::string FileIconSource::GetMimeType(const std::string&) const {
+  // Rely on image decoder inferring the correct type.
+  return std::string();
+}
+
 void FileIconSource::OnFileIconDataAvailable(IconManager::Handle handle,
                                              SkBitmap* icon) {
   IconManager* im = g_browser_process->icon_manager();