Revert of Windows install_static refactor.

chrome/install_static/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.
-
-#ifndef CHROME_INSTALL_STATIC_INSTALL_DETAILS_H_
-#define CHROME_INSTALL_STATIC_INSTALL_DETAILS_H_
-
-#include <memory>
-#include <string>
-
-#include "chrome/install_static/install_constants.h"
-
-namespace install_static {
-
-class PrimaryInstallDetails;
-
-// Details relating to how Chrome is installed. This class and
-// PrimaryInstallDetails (below) are used in tandem so that one instance of the
-// latter may be initialized early during process startup and then shared with
-// other modules in the process. For example, chrome_elf creates the instance
-// for a Chrome process and exports a GetInstallDetailsPayload function used by
-// chrome.exe and chrome.dll to create their own module-specific instances
-// referring to the same underlying payload. See install_modes.h for a gentle
-// introduction to such terms as "brand" and "mode".
-class InstallDetails {
- public:
-  // A POD-struct containing the underlying data for an InstallDetails
-  // instance. Multiple InstallDetails instances (e.g., one per module in a
-  // process) share a single underlying Payload.
-  struct Payload {
-    // The size (in bytes) of this structure. This serves to verify that all
-    // modules in a process have the same definition of the struct.
-    size_t size;
-
-    // The compile-time version of the product at the time that the process's
-    // primary module was built. This is used to detect version skew across
-    // modules in the process.
-    const char* product_version;
-
-    // The brand-specific install mode for this install; see kInstallModes.
-    const InstallConstants* mode;
-
-    // The friendly name of this Chrome's channel, or an empty string if the
-    // brand does not integrate with Google Update.
-    const wchar_t* channel;
-
-    // The string length of |channel| (not including the string terminator).
-    size_t channel_length;
-
-    // True if installed in C:\Program Files{, {x86)}; otherwise, false.
-    bool system_level;
-
-    // True if multi-install.
-    bool multi_install;
-  };
-
-  InstallDetails(const InstallDetails&) = delete;
-  InstallDetails(InstallDetails&&) = delete;
-  InstallDetails& operator=(const InstallDetails&) = delete;
-  virtual ~InstallDetails() = default;
-
-  // Returns the instance for this module.
-  static const InstallDetails& Get();
-
-  // This mode's index into the brand's array of install modes. This will match
-  // a brand-specific InstallConstantIndex enumerator.
-  int install_mode_index() const { return payload_->mode->index; }
-
-  // The mode's install suffix (e.g., " SxS" for canary Chrome), or an empty
-  // string for a brand's primary install mode.
-  const wchar_t* install_suffix() const {
-    return payload_->mode->install_suffix;
-  }
-
-  // The app GUID with which this mode is registered with Google Update, or an
-  // empty string if this brand does not integrate with Google Update.
-  const wchar_t* app_guid() const { return payload_->mode->app_guid; }
-
-  // True if the mode supports installation at system-level.
-  bool supports_system_level() const {
-    return payload_->mode->supports_system_level;
-  }
-
-  // True if the mode supports multi-install.
-  bool supports_multi_install() const {
-    return payload_->mode->supports_multi_install;
-  }
-
-  // The install's update channel, or an empty string if the brand does not
-  // integrate with Google Update.
-  std::wstring channel() const {
-    return std::wstring(payload_->channel, payload_->channel_length);
-  }
-  bool system_level() const { return payload_->system_level; }
-  bool multi_install() const { return payload_->multi_install; }
-
-  // Returns the path to the installation's ClientState registry key. Returns
-  // the path for the binaries if |binaries| and Chrome is
-  // multi-install. Otherwise, returns the path for Chrome itself. This registry
-  // key is used to hold various installation-related values, including an
-  // indication of consent for usage stats.
-  std::wstring GetClientStateKeyPath(bool binaries) const;
-
-  // Returns the path to the installation's ClientStateMedium registry key.
-  // Returns the path for the binaries if |binaries| and Chrome is
-  // multi-install. Otherwise, returns the path for Chrome itself. This
-  // registry key is used to hold various installation-related values, including
-  // an indication of consent for usage stats for a system-level install.
-  std::wstring GetClientStateMediumKeyPath(bool binaries) const;
-
-  // Returns true if there is an indication of a mismatch between the primary
-  // module and this module.
-  bool VersionMismatch() const;
-
-  // Sets the instance for the process. This must be called only once per
-  // process during startup.
-  static void SetForProcess(std::unique_ptr<PrimaryInstallDetails> details);
-
-  // Returns a pointer to the module's payload so that it may be shared with
-  // other modules in the process.
-  static const Payload* GetPayload();
-
-  // Initializes this module's instance with the payload owned by the process's
-  // primary module (the one that used SetForProcess). Said primary module must
-  // export the function:
-  // extern "C" const install_static::InstallDetails::Payload*
-  // GetInstallDetailsPayload();
-  static void InitializeFromPrimaryModule(const wchar_t* primary_module_name);
-
- protected:
-  explicit InstallDetails(const Payload* payload) : payload_(payload) {}
-  const wchar_t* default_channel_name() const {
-    return payload_->mode->default_channel_name;
-  }
-
- private:
-  const Payload* const payload_;
-};
-
-// A kind of InstallDetails that owns its payload. A single instance of this
-// class is initialized early on in process startup (e.g., in chrome_elf for the
-// case of chrome.exe; see InitializeProductDetailsForPrimaryModule). Its
-// underlying data (its "payload") is shared with other interested modules in
-// the process.
-class PrimaryInstallDetails : public InstallDetails {
- public:
-  PrimaryInstallDetails();
-  PrimaryInstallDetails(const PrimaryInstallDetails&) = delete;
-  PrimaryInstallDetails(PrimaryInstallDetails&&) = delete;
-  PrimaryInstallDetails& operator=(const PrimaryInstallDetails&) = delete;
-
-  void set_mode(const InstallConstants* mode) { payload_.mode = mode; }
-  void set_channel(const std::wstring& channel) {
-    channel_ = channel;
-    payload_.channel = channel_.c_str();
-    payload_.channel_length = channel_.size();
-  }
-  void set_system_level(bool system_level) {
-    payload_.system_level = system_level;
-  }
-  void set_multi_install(bool multi_install) {
-    payload_.multi_install = multi_install;
-  }
-
- private:
-  std::wstring channel_;
-  Payload payload_ = Payload();
-};
-
-}  // namespace install_static
-
-#endif  // CHROME_INSTALL_STATIC_INSTALL_DETAILS_H_