Inform disk cache of WebKit memory cache hits.

chrome/browser/renderer_host/chrome_render_message_filter.cc

Index: chrome/browser/renderer_host/chrome_render_message_filter.cc
diff --git a/chrome/browser/renderer_host/chrome_render_message_filter.cc b/chrome/browser/renderer_host/chrome_render_message_filter.cc
index b7f1cfe1bc646992679b1549b3252042188cb47f..f8090b43aab35b1fe8c2152b0bdc8181c4e7dbba 100644
--- a/chrome/browser/renderer_host/chrome_render_message_filter.cc
+++ b/chrome/browser/renderer_host/chrome_render_message_filter.cc
@@ -31,6 +31,8 @@
 #include "content/common/url_constants.h"
 #include "content/common/view_messages.h"
 #include "googleurl/src/gurl.h"
+#include "net/http/http_cache.h"
+#include "net/http/http_transaction_factory.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
 
@@ -134,6 +136,8 @@ bool ChromeRenderMessageFilter::OnMessageReceived(const IPC::Message& message,
     IPC_MESSAGE_HANDLER(ViewHostMsg_CanTriggerClipboardWrite,
                         OnCanTriggerClipboardWrite)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ClearPredictorCache, OnClearPredictorCache)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DidLoadResourceFromMemoryCache,
+                        OnDidLoadResourceFromMemoryCache)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -150,6 +154,12 @@ bool ChromeRenderMessageFilter::OnMessageReceived(const IPC::Message& message,
     handled = true;
   }
 
+  if (message.type() == ViewHostMsg_DidLoadResourceFromMemoryCache::ID) {
+    // We just needed to peek at this message. We still want it to reach its
+    // destination in TabContents.
+    handled = false;
+  }
+
   return handled;
 }
 
@@ -531,3 +541,11 @@ void ChromeRenderMessageFilter::OnSetCookie(const IPC::Message& message,
   AutomationResourceMessageFilter::SetCookiesForUrl(
       render_process_id_, message.routing_id(), url, cookie);
 }
+
+void ChromeRenderMessageFilter::OnDidLoadResourceFromMemoryCache(
+    const GURL& url,
+    const std::string& security_info,
+    const std::string& http_method) {
+  request_context_->GetURLRequestContext()->http_transaction_factory()->
+      GetCache()->OnExternalCacheHit(url, http_method);
+}