Send compressed histograms with system logs when sending feedback.

chrome/browser/extensions/api/feedback_private/feedback_service_nonchromeos.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/extensions/api/feedback_private/feedback_service.h"
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sys_info.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 16 matching lines @@
 class FeedbackServiceImpl
     : public FeedbackService,
       public base::SupportsWeakPtr<FeedbackServiceImpl> {
  public:
   FeedbackServiceImpl();
   virtual ~FeedbackServiceImpl();
 
   virtual std::string GetUserEmail() OVERRIDE;
   virtual void GetSystemInformation(
       const GetSystemInformationCallback& callback) OVERRIDE;
+  virtual void GetHistograms(std::string* histograms) OVERRIDE;
 
  private:
   // Overridden from FeedbackService:
   virtual base::WeakPtr<FeedbackService> GetWeakPtr() OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(FeedbackServiceImpl);
 };
 
 FeedbackService* FeedbackService::CreateInstance() {
   return new FeedbackServiceImpl;
@@ skipping 28 matching lines @@
       &sys_info_list, kChromeVersionTag, version_info.CreateVersionString());
 
   std::string os_version = base::SysInfo::OperatingSystemName() + ": " +
                            base::SysInfo::OperatingSystemVersion();
   FeedbackService::PopulateSystemInfo(
       &sys_info_list, kOsVersionTag, os_version);
 
   system_information_callback_.Run(sys_info_list);
 }
 
+void FeedbackServiceImpl::GetHistograms(std::string* histograms) {
+}
+
 base::WeakPtr<FeedbackService> FeedbackServiceImpl::GetWeakPtr() {
   return AsWeakPtr();
 }
 
 }  // namespace extensions