Hide MHTMLGenerationManager from chrome.

content/browser/tab_contents/tab_contents.cc

Index: content/browser/tab_contents/tab_contents.cc
===================================================================
--- content/browser/tab_contents/tab_contents.cc	(revision 124331)
+++ content/browser/tab_contents/tab_contents.cc	(working copy)
@@ -16,6 +16,7 @@
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/debugger/devtools_manager_impl.h"
 #include "content/browser/download/download_stats.h"
+#include "content/browser/download/mhtml_generation_manager.h"
 #include "content/browser/download/save_package.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
@@ -1128,6 +1129,12 @@
   return save_package_->Init();
 }
 
+void TabContents::GenerateMHTML(
+    const FilePath& file,
+    const base::Callback<void(const FilePath&, int64)>& callback) {
+  MHTMLGenerationManager::GetInstance()->GenerateMHTML(this, file, callback);
+}
+
 bool TabContents::IsActiveEntry(int32 page_id) {
   NavigationEntryImpl* active_entry =
       NavigationEntryImpl::FromNavigationEntry(controller_.GetActiveEntry());