Add content_browsertests for testing cache control flags

content/shell/browser/shell.cc

 // Copyright 2013 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/shell/browser/shell.h"
 
 #include <stddef.h>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 246 matching lines @@
 void Shell::GoBackOrForward(int offset) {
   web_contents_->GetController().GoToOffset(offset);
   web_contents_->Focus();
 }
 
 void Shell::Reload() {
   web_contents_->GetController().Reload(false);
   web_contents_->Focus();
 }
 
+void Shell::ReloadBypassingCache() {
+  web_contents_->GetController().ReloadBypassingCache(false);
+  web_contents_->Focus();
+}
+
 void Shell::Stop() {
   web_contents_->Stop();
   web_contents_->Focus();
 }
 
 void Shell::UpdateNavigationControls(bool to_different_document) {
   int current_index = web_contents_->GetController().GetCurrentEntryIndex();
   int max_index = web_contents_->GetController().GetEntryCount() - 1;
 
   PlatformEnableUIControl(BACK_BUTTON, current_index > 0);
@@ skipping 195 matching lines @@
   devtools_frontend_->Activate();
   devtools_frontend_->Focus();
 }
 
 void Shell::OnDevToolsWebContentsDestroyed() {
   devtools_observer_.reset();
   devtools_frontend_ = NULL;
 }
 
 }  // namespace content