Make Crashpad use the user data dir, rather than always default location

chrome/install_static/product_install_details.h

 // Copyright 2016 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.
 
 // Contains functions for determining the product's InstallDetails at runtime.
 
 #ifndef CHROME_INSTALL_STATIC_PRODUCT_INSTALL_DETAILS_H_
 #define CHROME_INSTALL_STATIC_PRODUCT_INSTALL_DETAILS_H_
 
 #include <memory>
 #include <string>
 
 namespace install_static {
 
 struct InstallConstants;
+class InstallDetails;
 class PrimaryInstallDetails;
 
 // Creates product details for the current process and sets them as the global
 // InstallDetails for the process. This is intended to be called early in
 // process startup. A process's "primary" module may be the executable itself or
 // may be another DLL that is loaded and initialized prior to executing the
 // executable's entrypoint (i.e., chrome_elf.dll).
 void InitializeProductDetailsForPrimaryModule();
 
 // Returns true if |parent| is a parent of |path|. Path separators at the end of
 // |parent| are ignored. Returns false if |parent| is empty.
 bool IsPathParentOf(const wchar_t* parent,
                     size_t parent_len,
                     const std::wstring& path);
 
 // Returns true if |path| is within C:\Program Files{, (x86)}.
 bool PathIsInProgramFiles(const std::wstring& path);
 
 // Returns the install suffix embedded in |exe_path| or an empty string if none
 // is found. |exe_path| is expected be something similar to
 // "...\[kProductName][suffix]\Application".
 std::wstring GetInstallSuffix(const std::wstring& exe_path);
 
 // Returns true if the browser of |mode| at |system_level| is registered as
 // being multi-install.
 bool IsMultiInstall(const InstallConstants& mode, bool system_level);
 
+// Populates |result| with the default User Data directory for the current
+// user. Returns false if all attempts at locating a User Data directory fail.
+// TODO(ananta)
+// http://crbug.com/604923
+// Unify this with the Browser Distribution code.
+bool GetDefaultUserDataDirectory(const InstallDetails& details,
+                                 std::wstring* result);
+
+// Populates |result| with the user data dir, respecting various overrides in
+// the manner of chrome_main_delegate.cc InitializeUserDataDir(). This includes
+// overrides on the command line, overrides by registry policy, and fallback to
+// the default User Data dir if the directory is invalid or unspecified.
+//
+// If a directory was given by the user (either on the command line, or by
+// registry policy), but it was invalid or unusable, then
+// |invalid_supplied_directory| will be filled with the value that was unusable
+// for reporting an error to the user.
+//
+// Other than in test situations, it is generally only appropriate to call this
+// function once on startup and use the result for subsequent callers, otherwise
+// there's a race with registry modification (which could cause a different
+// derivation) so different subsystems would see different values). In normal
+// usage, this will be called once at startup and saved into InstallDetails
+// from where it should be retrieved.
+bool GetUserDataDirectory(const std::wstring& user_data_dir_from_command_line,
+                          const InstallDetails& details,
+                          std::wstring* result,
+                          std::wstring* invalid_supplied_directory);
+
 // Creates product details for the process at |exe_path|.
 std::unique_ptr<PrimaryInstallDetails> MakeProductDetails(
     const std::wstring& exe_path);
 
 }  // namespace install_static
 
 #endif  // CHROME_INSTALL_STATIC_PRODUCT_INSTALL_DETAILS_H_