Receive cacheable metadata from the renderer and...

chrome/renderer/renderer_webkitclient_impl.cc

 // Copyright (c) 2010 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/renderer/renderer_webkitclient_impl.h"
 
 #if defined(USE_SYSTEM_SQLITE)
 #include <sqlite3.h>
 #else
 #include "third_party/sqlite/preprocessed/sqlite3.h"
@@ skipping 117 matching lines @@
 }
 
 void RendererWebKitClientImpl::prefetchHostName(const WebString& hostname) {
   if (!hostname.isEmpty()) {
     std::string hostname_utf8;
     UTF16ToUTF8(hostname.data(), hostname.length(), &hostname_utf8);
     DnsPrefetchCString(hostname_utf8.data(), hostname_utf8.length());
   }
 }
 
+bool RendererWebKitClientImpl::CheckPreparsedJsCachingEnabled() const {
+  static bool checked = false;
+  static bool result = false;
+  if (!checked) {
+    const CommandLine& command_line = *CommandLine::ForCurrentProcess();
+    result = command_line.HasSwitch(switches::kEnablePreparsedJsCaching);
+    checked = true;
+  }
+  return result;
+}
+
+void RendererWebKitClientImpl::cacheMetadata(
+    const WebKit::WebURL& url,
+    double response_time,
+    const char* data,
+    size_t size) {
+  if (!CheckPreparsedJsCachingEnabled())
+    return;
+
+  // Let the browser know we generated cacheable metadata for this resource. The
+  // browser may cache it and return it on subsequent responses to speed
+  // the processing of this resource.
+  std::vector<char> copy(data, data + size);
+  RenderThread::current()->Send(new ViewHostMsg_DidGenerateCacheableMetadata(
+      url, response_time, copy));
+}
+
 WebString RendererWebKitClientImpl::defaultLocale() {
   // TODO(darin): Eliminate this webkit_glue call.
   return WideToUTF16(webkit_glue::GetWebKitLocale());
 }
 
 void RendererWebKitClientImpl::suddenTerminationChanged(bool enabled) {
   if (enabled) {
     // We should not get more enables than disables, but we want it to be a
     // non-fatal error if it does happen.
     DCHECK_GT(sudden_termination_disables_, 0);
@@ skipping 223 matching lines @@
     const WebKit::WebString& challenge,
     const WebKit::WebURL& url) {
   std::string signed_public_key;
   RenderThread::current()->Send(new ViewHostMsg_Keygen(
       static_cast<uint32>(key_size_index),
       challenge.utf8(),
       GURL(url),
       &signed_public_key));
   return WebString::fromUTF8(signed_public_key);
 }