Skeleton of the Safe Browsing Subresource Filter.

components/test_runner/test_runner.h

Index: components/test_runner/test_runner.h
diff --git a/components/test_runner/test_runner.h b/components/test_runner/test_runner.h
index a22a5dbc2efe6ec867598f6692843633e4349b31..b58cf7a40c302d4fdbda555ce37cd7cb400e4576 100644
--- a/components/test_runner/test_runner.h
+++ b/components/test_runner/test_runner.h
@@ -405,6 +405,12 @@ class TestRunner : public WebTestRunner {
   void SetAutoplayAllowed(bool allowed);
   void DumpPermissionClientCallbacks();
 
+  // Sets up a mock DocumentSubresourceFilter to disallow subsequent subresource
+  // loads of the current document with the given path |suffixes|. The filter is
+  // created and injected even if |suffixes| is empty.

[Mike West, 2016/06/01 13:43:18]

Aside: Does an empty suffix mean that everything is allowed, or that everything
is blocked?

[engedy, 2016/06/02 23:07:19]

Clarified in the comment.

+  void SetDisallowedSubresourcePathSuffixes(
+      const std::vector<std::string>& suffixes);
+
   // This function sets a flag that tells the test_shell to dump all calls
   // to window.status().
   // It takes no arguments, and ignores any that may be present.