The optional Malware Details also collects HTTP cache information. See design...

chrome/browser/safe_browsing/malware_details.h

 // 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.
 
 #ifndef CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_H_
 #define CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_H_
 #pragma once
 
 // A class that encapsulates the detailed malware reports sent when
 // users opt-in to do so from the malware warning page.
 
 // An instance of this class is generated when a malware warning page
-// is shown (SafeBrowsingBlockingPage). It is passed on to the
-// SafeBrowsing service when the warning goes away.
+// is shown (SafeBrowsingBlockingPage).
 
 #include <string>
 #include <vector>
 
 #include "base/hash_tables.h"
 #include "base/memory/linked_ptr.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/safe_browsing/report.pb.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "content/browser/tab_contents/tab_contents_observer.h"
+#include "net/base/completion_callback.h"
 
 class TabContents;
 struct SafeBrowsingHostMsg_MalwareDOMDetails_Node;
 
+class MalwareDetailsCacheCollector;
 class MalwareDetailsFactory;
 
+namespace safe_browsing {
+// Maps a URL to its Resource.
+typedef base::hash_map<
+  std::string,
+  linked_ptr<safe_browsing::ClientMalwareReportRequest::Resource> > ResourceMap;
+}
+
 class MalwareDetails : public base::RefCountedThreadSafe<MalwareDetails>,
                        public TabContentsObserver {
  public:
   // Constructs a new MalwareDetails instance, using the factory.
   static MalwareDetails* NewMalwareDetails(
+      SafeBrowsingService* sb_service,
       TabContents* tab_contents,
       const SafeBrowsingService::UnsafeResource& resource);
 
   // Makes the passed |factory| the factory used to instanciate
   // SafeBrowsingBlockingPage objects. Useful for tests.
   static void RegisterFactory(MalwareDetailsFactory* factory) {
     factory_ = factory;
   }
 
-  // The SafeBrowsingService calls this from the IO thread, to get the
-  // serialized report as a string and send it over.
-  const std::string* GetSerializedReport();
+  // The SafeBrowsingBlockingPage calls this from the IO thread when
+  // the user is leaving the blocking page and has opted-in to sending
+  // the report. We start the cache collection, and when we are done,
+  // we send the report.
+  void FinishCollection();
+
+  void OnCacheCollectionReady();
 
   // TabContentsObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message);
 
  protected:
   friend class MalwareDetailsFactoryImpl;
 
-  MalwareDetails(TabContents* tab_contents,
+  MalwareDetails(SafeBrowsingService* sb_service,
+                 TabContents* tab_contents,
                  const SafeBrowsingService::UnsafeResource& resource);
 
+  virtual ~MalwareDetails();
+
   // Called on the IO thread with the DOM details.
   virtual void AddDOMDetails(
       const std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node>& params);
 
-  virtual ~MalwareDetails();
+  // The report protocol buffer.
+  scoped_ptr<safe_browsing::ClientMalwareReportRequest> report_;
+
+  // Used to get a pointer to the HTTP cache.
+  net::URLRequestContextGetter* request_context_getter_;
 
  private:
   friend class base::RefCountedThreadSafe<MalwareDetails>;
 
-  // Maps a URL to its Resource.
-  typedef base::hash_map<
-    std::string,
-    linked_ptr<safe_browsing::ClientMalwareReportRequest::Resource> >
-  ResourceMap;
-
   // Starts the collection of the report.
   void StartCollection();
 
   // Whether the url is "public" so we can add it to the report.
   bool IsPublicUrl(const GURL& url) const;
 
   // Finds an existing Resource for the given url, or creates a new
   // one if not found, and adds it to |resources_|. Returns the
   // found/created resource.
   safe_browsing::ClientMalwareReportRequest::Resource* FindOrCreateResource(
       const GURL& url);
 
   // Adds a Resource to resources_ with the given parent-child
   // relationship. |parent| and |tagname| can be empty, |children| can be NULL.
   void AddUrl(const GURL& url,
               const GURL& parent,
               const std::string& tagname,
               const std::vector<GURL>* children);
 
   // Message handler.
   void OnReceivedMalwareDOMDetails(
       const std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node>& params);
 
+  scoped_refptr<SafeBrowsingService> sb_service_;
+
   const SafeBrowsingService::UnsafeResource resource_;
 
   // For every Url we collect we create a Resource message. We keep
   // them in a map so we can avoid duplicates.
-  ResourceMap resources_;
+  safe_browsing::ResourceMap resources_;
 
-  // The report protocol buffer.
-  scoped_ptr<safe_browsing::ClientMalwareReportRequest> report_;
+  // Result from the cache extractor.
+  int cache_result_;
 
   // The factory used to instanciate SafeBrowsingBlockingPage objects.
   // Usefull for tests, so they can provide their own implementation of
   // SafeBrowsingBlockingPage.
   static MalwareDetailsFactory* factory_;
 
+  // Used to collect details from the HTTP Cache.
+  scoped_refptr<MalwareDetailsCacheCollector> cache_collector_;
+
   FRIEND_TEST_ALL_PREFIXES(MalwareDetailsTest, MalwareDOMDetails);
+  FRIEND_TEST_ALL_PREFIXES(MalwareDetailsTest, HTTPCache);
+  FRIEND_TEST_ALL_PREFIXES(MalwareDetailsTest, HTTPCacheNoEntries);
 
   DISALLOW_COPY_AND_ASSIGN(MalwareDetails);
 };
 
 // Factory for creating MalwareDetails.  Useful for tests.
 class MalwareDetailsFactory {
  public:
   virtual ~MalwareDetailsFactory() { }
 
   virtual MalwareDetails* CreateMalwareDetails(
+      SafeBrowsingService* sb_service,
       TabContents* tab_contents,
       const SafeBrowsingService::UnsafeResource& unsafe_resource) = 0;
 };
 
 #endif  // CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_H_