[Cronet] Don't claim support of UrlRequests with data URL scheme.

components/cronet/ios/Cronet.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "components/cronet/ios/Cronet.h"
 
 #include <memory>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
@@ skipping 73 matching lines @@
       RequestFilterBlock block = filter_.get();
       return block(request);
     }
     return true;
   }
 
   bool IsRequestSupported(NSURLRequest* request) override {
     NSString* scheme = [[request URL] scheme];
     if (!scheme)
       return false;
-    return [scheme caseInsensitiveCompare:@"data"] == NSOrderedSame ||
-           [scheme caseInsensitiveCompare:@"http"] == NSOrderedSame ||
+    return [scheme caseInsensitiveCompare:@"http"] == NSOrderedSame ||
            [scheme caseInsensitiveCompare:@"https"] == NSOrderedSame;
   }
 
   net::URLRequestContextGetter* GetDefaultURLRequestContext() override {
     return getter_.get();
   }
 
   scoped_refptr<net::URLRequestContextGetter> getter_;
   base::mac::ScopedBlock<RequestFilterBlock> filter_;
   base::Lock lock_;
@@ skipping 222 matching lines @@
       base::SysNSStringToUTF8(hostResolverRulesForTesting));
 }
 
 // This is a non-public dummy method that prevents the linker from stripping out
 // the otherwise non-referenced methods from 'bidirectional_stream.cc'.
 + (void)preventStrippingCronetBidirectionalStream {
   bidirectional_stream_create(NULL, 0, 0);
 }
 
 @end