Experimentally isolate GetSaveFileName in a utility process.

chrome/common/chrome_utility_messages.h

 // Copyright (c) 2012 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.
 
 // Multiply-included message file, so no include guard.
 
 #if defined(OS_WIN)
 #include <Windows.h>
 #endif  // defined(OS_WIN)
 
@@ skipping 18 matching lines @@
 typedef std::vector<Tuple2<SkBitmap, base::FilePath> > DecodedImages;
 
 #endif  // CHROME_COMMON_CHROME_UTILITY_MESSAGES_H_
 
 IPC_STRUCT_TRAITS_BEGIN(safe_browsing::zip_analyzer::Results)
   IPC_STRUCT_TRAITS_MEMBER(success)
   IPC_STRUCT_TRAITS_MEMBER(has_executable)
   IPC_STRUCT_TRAITS_MEMBER(has_archive)
 IPC_STRUCT_TRAITS_END()
 
+#if defined(OS_WIN)
+
+// A vector of filters, each being a Tuple2 containing a display string (i.e.
+// "Text Files") and a filter pattern (i.e. "*.txt").
+typedef std::vector<Tuple2<base::string16, base::string16> >
+    GetOpenFileNameFilter;
+
+IPC_STRUCT_BEGIN(ChromeUtilityMsg_GetSaveFileName_Params)
+  IPC_STRUCT_MEMBER(HWND, owner)
+  IPC_STRUCT_MEMBER(DWORD, flags)
+  IPC_STRUCT_MEMBER(GetOpenFileNameFilter, filters)
+  IPC_STRUCT_MEMBER(int, one_based_filter_index)
+  IPC_STRUCT_MEMBER(base::FilePath, suggested_filename)
+  IPC_STRUCT_MEMBER(base::FilePath, initial_directory)
+  IPC_STRUCT_MEMBER(base::string16, default_extension)
+IPC_STRUCT_END()
+
+#endif  // OS_WIN
+
 //------------------------------------------------------------------------------
 // Utility process messages:
 // These are messages from the browser to the utility process.
 
 // Tell the utility process to parse the given JSON data and verify its
 // validity.
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_UnpackWebResource,
                      std::string /* JSON data */)
 
 // Tell the utility process to decode the given image data.
@@ skipping 38 matching lines @@
 // Tells the utility process to analyze a zip file for malicious download
 // protection.
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_AnalyzeZipFileForDownloadProtection,
                      IPC::PlatformFileForTransit /* zip_file */)
 #endif
 
 #if defined(OS_WIN)
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_OpenItemViaShell,
                      base::FilePath /* full_path */)
 
-// A vector of filters, each being a Tuple2a display string (i.e. "Text Files")
-// and a filter pattern (i.e. "*.txt")..
-typedef std::vector<Tuple2<base::string16, base::string16> >
-    GetOpenFileNameFilter;
-
 // Instructs the utility process to invoke GetOpenFileName. |owner| is the
 // parent of the modal dialog, |flags| are OFN_* flags. |filter| constrains the
 // user's file choices. |initial_directory| and |filename| select the directory
 // to be displayed and the file to be initially selected.
 //
 // Either ChromeUtilityHostMsg_GetOpenFileName_Failed or
 // ChromeUtilityHostMsg_GetOpenFileName_Result will be returned when the
 // operation completes whether due to error or user action.
 IPC_MESSAGE_CONTROL5(ChromeUtilityMsg_GetOpenFileName,
                      HWND /* owner */,
                      DWORD /* flags */,
                      GetOpenFileNameFilter /* filter */,
                      base::FilePath /* initial_directory */,
                      base::FilePath /* filename */)
+IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_GetSaveFileName,
+                     ChromeUtilityMsg_GetSaveFileName_Params /* params */)
 #endif  // defined(OS_WIN)
 
 //------------------------------------------------------------------------------
 // Utility process host messages:
 // These are messages from the utility process to the browser.
 
 // Reply when the utility process is done unpacking and parsing JSON data
 // from a web resource.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_UnpackWebResource_Succeeded,
                      base::DictionaryValue /* json data */)
@@ skipping 30 matching lines @@
 IPC_MESSAGE_CONTROL1(
     ChromeUtilityHostMsg_AnalyzeZipFileForDownloadProtection_Finished,
     safe_browsing::zip_analyzer::Results)
 #endif
 
 #if defined(OS_WIN)
 IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_GetOpenFileName_Failed)
 IPC_MESSAGE_CONTROL2(ChromeUtilityHostMsg_GetOpenFileName_Result,
                      base::FilePath /* directory */,
                      std::vector<base::FilePath> /* filenames */)
+IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_GetSaveFileName_Failed)
+IPC_MESSAGE_CONTROL2(ChromeUtilityHostMsg_GetSaveFileName_Result,
+                     base::FilePath /* path */,
+                     int /* one_based_filter_index  */)
 #endif  // defined(OS_WIN)