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 fe056e1caee1bc60ed00aefe542235cb9a1b8dd0..752c84c8d5095fea13adb6e0d3f2a712d434d4f5 100644
--- a/components/test_runner/test_runner.h
+++ b/components/test_runner/test_runner.h
@@ -409,6 +409,13 @@ class TestRunner : public WebTestRunner {
   void SetAutoplayAllowed(bool allowed);
   void DumpPermissionClientCallbacks();
 
+  // Sets up a mock DocumentSubresourceFilter to disallow subsequent subresource
+  // loads within the current document with the given path |suffixes|. The
+  // filter is created and injected even if |suffixes| is empty. If |suffixes|
+  // contains the empty string, all subresource loads will be disallowed.
+  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.