Faster Reload: Specify AllowCaching = false for some URLDataSources that need it

chrome/browser/search/iframe_source.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 "chrome/browser/search/iframe_source.h"
 
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/search/instant_io_context.h"
@@ skipping 18 matching lines @@
     return "application/javascript";
   if (base::EndsWith(path, ".png", base::CompareCase::INSENSITIVE_ASCII))
     return "image/png";
   if (base::EndsWith(path, ".css", base::CompareCase::INSENSITIVE_ASCII))
     return "text/css";
   if (base::EndsWith(path, ".html", base::CompareCase::INSENSITIVE_ASCII))
     return "text/html";
   return std::string();
 }
 
+bool IframeSource::AllowCaching() const {
+  return false;
+}
+
 bool IframeSource::ShouldServiceRequest(
     const net::URLRequest* request) const {
   const std::string& path = request->url().path();
   return InstantIOContext::ShouldServiceRequest(request) &&
          request->url().SchemeIs(chrome::kChromeSearchScheme) &&
          request->url().host_piece() == GetSource() && ServesPath(path);
 }
 
 bool IframeSource::ShouldDenyXFrameOptions() const {
   return false;
@@ skipping 35 matching lines @@
     callback.Run(NULL);
     return;
   }
 
   base::StringPiece template_js =
       ResourceBundle::GetSharedInstance().GetRawDataResource(resource_id);
   std::string response(template_js.as_string());
   base::ReplaceFirstSubstringAfterOffset(&response, 0, "{{ORIGIN}}", origin);
   callback.Run(base::RefCountedString::TakeString(&response));
 }