Remove net::Filter direct dependency on IsSupportedMimeType

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index 39e3626fbfdaa6c5f547c3a03846acb06af9693b..3912e60f4d557e63c49a7623932c1f6141e086d0 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -44,6 +44,7 @@
 #include "content/public/common/process_type.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/load_flags.h"
+#include "net/base/mime_util.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 #include "net/cookies/canonical_cookie.h"
@@ -749,3 +750,9 @@ bool ChromeNetworkDelegate::OnCancelURLRequestWithPolicyViolatingReferrerHeader(
   ReportInvalidReferrerSend(target_url, referrer_url);
   return true;
 }
+
+bool ChromeNetworkDelegate::OnIsSupportedMimeType(
+    const std::string& mime_type) const {
+  return net::IsSupportedMimeType(mime_type);
+}
+