Experimentally isolate GetOpenFileName 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)
+
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/strings/string16.h"
 #include "base/tuple.h"
 #include "base/values.h"
 #include "chrome/common/safe_browsing/zip_analyzer.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_platform_file.h"
@@ skipping 62 matching lines @@
 // be used if the host process needs a handle to the running utility process.
 IPC_MESSAGE_CONTROL0(ChromeUtilityMsg_StartupPing)
 
 #if defined(FULL_SAFE_BROWSING)
 // 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)
+// 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 */)
+#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 */)
 
 // Reply when the utility process has failed while unpacking and parsing a
@@ skipping 26 matching lines @@
 
 // Reply when the utility process has started.
 IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_ProcessStarted)
 
 #if defined(FULL_SAFE_BROWSING)
 // Reply when a zip file has been analyzed for malicious download protection.
 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 */)
+#endif  // defined(OS_WIN)