Modifying the "dangerous download" algorithm.

chrome/browser/download/download_util.h

Index: chrome/browser/download/download_util.h
diff --git a/chrome/browser/download/download_util.h b/chrome/browser/download/download_util.h
index 0224a26df98ac5f1b2b668383448f16c7468a7bb..81f3b2a89d6e1ce0fb6ccc5e66586a3ae3df4491 100644
--- a/chrome/browser/download/download_util.h
+++ b/chrome/browser/download/download_util.h
@@ -152,11 +152,24 @@ void DragDownload(const DownloadItem* download,
 
 // Executable file support -----------------------------------------------------
 
-// Tests if a file is considered executable, based on its type.
-bool IsExecutableFile(const FilePath& path);
+enum DownloadDangerLevel {
+  NotDangerous,
+  AllowOnUserGesture,
+  Dangerous
+};
+
+// Determine the download danger level of a file.
+DownloadDangerLevel GetFileDangerLevel(const FilePath& path);
+
+// Determine the download danger level using a file extension.
+DownloadDangerLevel GetFileExtensionDangerLevel(
+    const FilePath::StringType& extension);
+
+// True if the download danger level of the file is NotDangerous.
+bool IsFileSafe(const FilePath& path);
 
-// Determine if the specified extension is an executable extension.
-bool IsExecutableExtension(const FilePath::StringType& extension);
+// True if the download danger level of the extension is NotDangerous.
+bool IsFileExtensionSafe(const FilePath::StringType& extension);
 
 // Tests if we think the server means for this mime_type to be executable.
 bool IsExecutableMimeType(const std::string& mime_type);