Prevent loading libffmpegsumo.so to python (autotests) process.

content/public/test/content_test_suite_base.h

Index: content/public/test/content_test_suite_base.h
diff --git a/content/public/test/content_test_suite_base.h b/content/public/test/content_test_suite_base.h
index 7d011a6f8d39bc243a238caa2ec7bf8dea446f55..7887cc3dd0d47d35173ec71a11f674ea28af4295 100644
--- a/content/public/test/content_test_suite_base.h
+++ b/content/public/test/content_test_suite_base.h
@@ -25,7 +25,14 @@ class ContentTestSuiteBase : public base::TestSuite {
   // Creates a ContentClient for use during test suite initialization.
   virtual ContentClient* CreateClientForInitialization() = 0;
 
+  // If set to false, prevents Initialize() to load external libraries
+  // to the process. By default loading is enabled.
+  void set_external_libraries_enabled(bool val) {
+    external_libraries_enabled_ = val;
+  }
+
  private:
+  bool external_libraries_enabled_;
   DISALLOW_COPY_AND_ASSIGN(ContentTestSuiteBase);
 };