Fix bug 79905: Drag and drop of "DownloadURL" type ignores specified filename for data URLs.

chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/tab_contents/web_drag_source.h"
 
 #include <sys/param.h>
 
 #include "app/mac/nsimage_cache.h"
 #include "base/file_path.h"
@@ skipping 51 matching lines @@
   ScopedCrashKey key(kUrlKey, value);
 
   // Images without ALT text will only have a file extension so we need to
   // synthesize one from the provided extension and URL.
   FilePath file_name(FilePathFromFilename(drop_data.file_description_filename));
   file_name = file_name.BaseName().RemoveExtension();
 
   if (file_name.empty()) {
     // Retrieve the name from the URL.
     string16 suggested_filename =
-        net::GetSuggestedFilename(drop_data.url, "", "", string16());
+        net::GetSuggestedFilename(drop_data.url, "", "", "", string16());
     file_name = FilePathFromFilename(suggested_filename);
   }
 
   file_name = file_name.ReplaceExtension(UTF16ToUTF8(drop_data.file_extension));
 
   return file_name;
 }
 
 // This class's sole task is to write out data for a promised file; the caller
 // is responsible for opening the file.
@@ skipping 312 matching lines @@
       fileExtension = (dropData_->file_extension.length() > 0) ?
           SysUTF16ToNSString(dropData_->file_extension.substr(1)) : @"";
     } else {
       string16 mimeType;
       FilePath fileName;
       if (drag_download_util::ParseDownloadMetadata(
               dropData_->download_metadata,
               &mimeType,
               &fileName,
               &downloadURL_)) {
-        std::string contentDisposition =
-            "attachment; filename=" + fileName.value();
-        download_util::GenerateFileName(downloadURL_,
-                                        contentDisposition,
-                                        std::string(),
-                                        UTF16ToUTF8(mimeType),
-                                        &downloadFileName_);
+        download_util::GenerateFileNameFromSuggestedName(
+            downloadURL_,
+            fileName.value(),
+            UTF16ToUTF8(mimeType),
+            &downloadFileName_);
         fileExtension = SysUTF8ToNSString(downloadFileName_.Extension());
       }
     }
 
     if (fileExtension) {
       // File contents (with and without specific type), file (HFS) promise,
       // TIFF.
       // TODO(viettrungluu): others?
       [pasteboard_ addTypes:[NSArray arrayWithObjects:
                                   NSFileContentsPboardType,
@@ skipping 17 matching lines @@
 
 - (NSImage*)dragImage {
   if (dragImage_)
     return dragImage_;
 
   // Default to returning a generic image.
   return app::mac::GetCachedImageWithName(@"nav.pdf");
 }
 
 @end  // @implementation WebDragSource (Private)