BlobUrlBrowserTest: Add a test exercising blob: URLs from file:// documents.

content/public/test/browser_test_base.cc

 // 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.
 
 #include "content/public/test/browser_test_base.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 128 matching lines @@
 }
 
 }  // namespace
 
 extern int BrowserMain(const MainFunctionParams&);
 
 BrowserTestBase::BrowserTestBase()
     : expected_exit_code_(0),
       enable_pixel_output_(false),
       use_software_compositing_(false),
+      allow_file_access_from_files_(true),
       set_up_called_(false) {
 #if defined(OS_MACOSX)
   base::mac::SetOverrideAmIBundled(true);
 #endif
 
 #if defined(USE_AURA) && defined(USE_X11)
   aura::test::SetUseOverrideRedirectWindowByDefault(true);
 #endif
 
 #if defined(OS_POSIX)
@@ skipping 29 matching lines @@
   ui::test::MaterialDesignControllerTestAPI::Uninitialize();
 
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 
   // Override the child process connection timeout since tests can exceed that
   // when sharded.
   command_line->AppendSwitchASCII(
       switches::kIPCConnectionTimeout,
       base::Int64ToString(TestTimeouts::action_max_timeout().InSeconds()));
 
-  // The tests assume that file:// URIs can freely access other file:// URIs.
-  command_line->AppendSwitch(switches::kAllowFileAccessFromFiles);
+  // Many tests load their pages via file://, so we enable it by default, unless
+  // the test called RevokeFileAccessFromFiles() to return to the normal
+  // behavior.
+  if (allow_file_access_from_files_)
+    command_line->AppendSwitch(switches::kAllowFileAccessFromFiles);
 
   command_line->AppendSwitch(switches::kDomAutomationController);
 
   // It is sometimes useful when looking at browser test failures to know which
   // GPU blacklisting decisions were made.
   command_line->AppendSwitch(switches::kLogGpuControlListDecisions);
 
   if (use_software_compositing_)
     command_line->AppendSwitch(switches::kDisableGpu);
 
@@ skipping 171 matching lines @@
       base::Bind(&RunTaskOnRendererThread, task, runner->QuitClosure()));
   runner->Run();
 }
 
 void BrowserTestBase::EnablePixelOutput() { enable_pixel_output_ = true; }
 
 void BrowserTestBase::UseSoftwareCompositing() {
   use_software_compositing_ = true;
 }
 
+void BrowserTestBase::RevokeFileAccessFromFiles() {
+  allow_file_access_from_files_ = false;
+}
+
 bool BrowserTestBase::UsingOSMesa() const {
   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
   return cmd->GetSwitchValueASCII(switches::kUseGL) ==
          gl::kGLImplementationOSMesaName;
 }
 
 }  // namespace content