FBTF: Move individual XXXMsg_Params structs to a new file.

The new file, render_messages_params.h, is included in 57 files, while
render_messages.h is included in 176 files. Moving the Params structs to their
own file allow pruning the included headers.

(Part 2 of this cleanup will be sorting the individual structs into themes
to further minimize header inclusion.)

BUG=51411
TEST=compiles

Review URL: http://codereview.chromium.org/3119035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57229 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1097 insertions, 0 deletions

diff --git a/chrome/common/render_messages_params.h b/chrome/common/render_messages_params.h
new file mode 100644
index 0000000..abf2b028
--- /dev/null
+++ b/chrome/common/render_messages_params.h
@@ -0,0 +1,1097 @@
+// Copyright (c) 2010 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_COMMON_RENDER_MESSAGES_PARAMS_H_
+#define CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_
+#pragma once
+
+#include <string>
+#include <vector>
+
+#include "app/surface/transport_dib.h"
+#include "base/file_path.h"
+#include "base/ref_counted.h"
+#include "base/shared_memory.h"
+#include "base/time.h"
+#include "base/values.h"
+#include "chrome/common/dom_storage_common.h"
+#include "chrome/common/extensions/extension_extent.h"
+#include "chrome/common/extensions/url_pattern.h"
+#include "chrome/common/indexed_db_key.h"
+#include "chrome/common/navigation_gesture.h"
+#include "chrome/common/navigation_types.h"
+#include "chrome/common/page_transition_types.h"
+#include "chrome/common/renderer_preferences.h"
+#include "chrome/common/window_container_type.h"
+#include "googleurl/src/gurl.h"
+#include "ipc/ipc_param_traits.h"
+#include "media/audio/audio_io.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebFileSystem.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebTextDirection.h"
+#include "webkit/glue/password_form.h"
+#include "webkit/glue/plugins/webplugin.h"
+#include "webkit/glue/resource_type.h"
+#include "webkit/glue/webmenuitem.h"
+#include "webkit/glue/webpreferences.h"
+
+// TODO(erg): Split this file into $1_db_params.h, $1_audio_params.h,
+// $1_print_params.h and $1_render_params.h.
+
+namespace net {
+class UploadData;
+}
+
+// Parameters structure for ViewMsg_Navigate, which has too many data
+// parameters to be reasonably put in a predefined IPC message.
+struct ViewMsg_Navigate_Params {
+  enum NavigationType {
+    // Reload the page.
+    RELOAD,
+
+    // Reload the page, ignoring any cache entries.
+    RELOAD_IGNORING_CACHE,
+
+    // The navigation is the result of session restore and should honor the
+    // page's cache policy while restoring form state. This is set to true if
+    // restoring a tab/session from the previous session and the previous
+    // session did not crash. If this is not set and the page was restored then
+    // the page's cache policy is ignored and we load from the cache.
+    RESTORE,
+
+    // Navigation type not categorized by the other types.
+    NORMAL
+  };
+
+  // The page_id for this navigation, or -1 if it is a new navigation.  Back,
+  // Forward, and Reload navigations should have a valid page_id.  If the load
+  // succeeds, then this page_id will be reflected in the resultant
+  // ViewHostMsg_FrameNavigate message.
+  int32 page_id;
+
+  // If page_id is -1, then pending_history_list_offset will also be -1.
+  // Otherwise, it contains the offset into the history list corresponding to
+  // the current navigation.
+  int pending_history_list_offset;
+
+  // Informs the RenderView of where its current page contents reside in
+  // session history and the total size of the session history list.
+  int current_history_list_offset;
+  int current_history_list_length;
+
+  // The URL to load.
+  GURL url;
+
+  // The URL to send in the "Referer" header field. Can be empty if there is
+  // no referrer.
+  GURL referrer;
+
+  // The type of transition.
+  PageTransition::Type transition;
+
+  // Opaque history state (received by ViewHostMsg_UpdateState).
+  std::string state;
+
+  // Type of navigation.
+  NavigationType navigation_type;
+
+  // The time the request was created
+  base::Time request_time;
+};
+
+// Current status of the audio output stream in the browser process. Browser
+// sends information about the current playback state and error to the
+// renderer process using this type.
+struct ViewMsg_AudioStreamState_Params {
+  enum State {
+    kPlaying,
+    kPaused,
+    kError
+  };
+
+  // Carries the current playback state.
+  State state;
+};
+
+// The user has completed a find-in-page; this type defines what actions the
+// renderer should take next.
+struct ViewMsg_StopFinding_Params {
+  enum Action {
+    kClearSelection,
+    kKeepSelection,
+    kActivateSelection
+  };
+
+  // The action that should be taken when the find is completed.
+  Action action;
+};
+
+// The install state of the search provider (not installed, installed, default).
+struct ViewHostMsg_GetSearchProviderInstallState_Params {
+  enum State {
+    // Equates to an access denied error.
+    DENIED = -1,
+
+    // DON'T CHANGE THE VALUES BELOW.
+    // All of the following values are manidated by the
+    // spec for window.external.IsSearchProviderInstalled.
+
+    // The search provider is not installed.
+    NOT_INSTALLED = 0,
+
+    // The search provider is in the user's set but is not
+    INSTALLED_BUT_NOT_DEFAULT = 1,
+
+    // The search provider is set as the user's default.
+    INSTALLED_AS_DEFAULT = 2
+  };
+  State state;
+
+  ViewHostMsg_GetSearchProviderInstallState_Params()
+      : state(DENIED) {
+  }
+
+  explicit ViewHostMsg_GetSearchProviderInstallState_Params(State s)
+      : state(s) {
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params Denied() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(DENIED);
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params NotInstalled() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(NOT_INSTALLED);
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params
+      InstallButNotDefault() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(
+        INSTALLED_BUT_NOT_DEFAULT);
+  }
+
+  static ViewHostMsg_GetSearchProviderInstallState_Params InstalledAsDefault() {
+    return ViewHostMsg_GetSearchProviderInstallState_Params(
+        INSTALLED_AS_DEFAULT);
+  }
+};
+
+// Parameters structure for ViewHostMsg_FrameNavigate, which has too many data
+// parameters to be reasonably put in a predefined IPC message.
+struct ViewHostMsg_FrameNavigate_Params {
+  // Page ID of this navigation. The renderer creates a new unique page ID
+  // anytime a new session history entry is created. This means you'll get new
+  // page IDs for user actions, and the old page IDs will be reloaded when
+  // iframes are loaded automatically.
+  int32 page_id;
+
+  // URL of the page being loaded.
+  GURL url;
+
+  // URL of the referrer of this load. WebKit generates this based on the
+  // source of the event that caused the load.
+  GURL referrer;
+
+  // The type of transition.
+  PageTransition::Type transition;
+
+  // Lists the redirects that occurred on the way to the current page. This
+  // vector has the same format as reported by the WebDataSource in the glue,
+  // with the current page being the last one in the list (so even when
+  // there's no redirect, there will be one entry in the list.
+  std::vector<GURL> redirects;
+
+  // Set to false if we want to update the session history but not update
+  // the browser history.  E.g., on unreachable urls.
+  bool should_update_history;
+
+  // See SearchableFormData for a description of these.
+  GURL searchable_form_url;
+  std::string searchable_form_encoding;
+
+  // See password_form.h.
+  webkit_glue::PasswordForm password_form;
+
+  // Information regarding the security of the connection (empty if the
+  // connection was not secure).
+  std::string security_info;
+
+  // The gesture that initiated this navigation.
+  NavigationGesture gesture;
+
+  // Contents MIME type of main frame.
+  std::string contents_mime_type;
+
+  // True if this was a post request.
+  bool is_post;
+
+  // Whether the content of the frame was replaced with some alternate content
+  // (this can happen if the resource was insecure).
+  bool is_content_filtered;
+
+  // The status code of the HTTP request.
+  int http_status_code;
+};
+
+// Values that may be OR'd together to form the 'flags' parameter of a
+// ViewHostMsg_UpdateRect_Params structure.
+struct ViewHostMsg_UpdateRect_Flags {
+  enum {
+    IS_RESIZE_ACK = 1 << 0,
+    IS_RESTORE_ACK = 1 << 1,
+    IS_REPAINT_ACK = 1 << 2,
+  };
+  static bool is_resize_ack(int flags) {
+    return (flags & IS_RESIZE_ACK) != 0;
+  }
+  static bool is_restore_ack(int flags) {
+    return (flags & IS_RESTORE_ACK) != 0;
+  }
+  static bool is_repaint_ack(int flags) {
+    return (flags & IS_REPAINT_ACK) != 0;
+  }
+};
+
+struct ViewHostMsg_UpdateRect_Params {
+  // The bitmap to be painted into the view at the locations specified by
+  // update_rects.
+  TransportDIB::Id bitmap;
+
+  // The position and size of the bitmap.
+  gfx::Rect bitmap_rect;
+
+  // The scroll offset.  Only one of these can be non-zero, and if they are
+  // both zero, then it means there is no scrolling and the scroll_rect is
+  // ignored.
+  int dx;
+  int dy;
+
+  // The rectangular region to scroll.
+  gfx::Rect scroll_rect;
+
+  // The regions of the bitmap (in view coords) that contain updated pixels.
+  // In the case of scrolling, this includes the scroll damage rect.
+  std::vector<gfx::Rect> copy_rects;
+
+  // The size of the RenderView when this message was generated.  This is
+  // included so the host knows how large the view is from the perspective of
+  // the renderer process.  This is necessary in case a resize operation is in
+  // progress.
+  gfx::Size view_size;
+
+  // New window locations for plugin child windows.
+  std::vector<webkit_glue::WebPluginGeometry> plugin_window_moves;
+
+  // The following describes the various bits that may be set in flags:
+  //
+  //   ViewHostMsg_UpdateRect_Flags::IS_RESIZE_ACK
+  //     Indicates that this is a response to a ViewMsg_Resize message.
+  //
+  //   ViewHostMsg_UpdateRect_Flags::IS_RESTORE_ACK
+  //     Indicates that this is a response to a ViewMsg_WasRestored message.
+  //
+  //   ViewHostMsg_UpdateRect_Flags::IS_REPAINT_ACK
+  //     Indicates that this is a response to a ViewMsg_Repaint message.
+  //
+  // If flags is zero, then this message corresponds to an unsoliticed paint
+  // request by the render view.  Any of the above bits may be set in flags,
+  // which would indicate that this paint message is an ACK for multiple
+  // request messages.
+  int flags;
+};
+
+// Information on closing a tab. This is used both for ViewMsg_ClosePage, and
+// the corresponding ViewHostMsg_ClosePage_ACK.
+struct ViewMsg_ClosePage_Params {
+  // The identifier of the RenderProcessHost for the currently closing view.
+  //
+  // These first two parameters are technically redundant since they are
+  // needed only when processing the ACK message, and the processor
+  // theoretically knows both the process and route ID. However, this is
+  // difficult to figure out with our current implementation, so this
+  // information is duplicate here.
+  int closing_process_id;
+
+  // The route identifier for the currently closing RenderView.
+  int closing_route_id;
+
+  // True when this close is for the first (closing) tab of a cross-site
+  // transition where we switch processes. False indicates the close is for the
+  // entire tab.
+  //
+  // When true, the new_* variables below must be filled in. Otherwise they must
+  // both be -1.
+  bool for_cross_site_transition;
+
+  // The identifier of the RenderProcessHost for the new view attempting to
+  // replace the closing one above. This must be valid when
+  // for_cross_site_transition is set, and must be -1 otherwise.
+  int new_render_process_host_id;
+
+  // The identifier of the *request* the new view made that is causing the
+  // cross-site transition. This is *not* a route_id, but the request that we
+  // will resume once the ACK from the closing view has been received. This
+  // must be valid when for_cross_site_transition is set, and must be -1
+  // otherwise.
+  int new_request_id;
+};
+
+// Parameters for a resource request.
+struct ViewHostMsg_Resource_Request {
+  // The request method: GET, POST, etc.
+  std::string method;
+
+  // The requested URL.
+  GURL url;
+
+  // Usually the URL of the document in the top-level window, which may be
+  // checked by the third-party cookie blocking policy. Leaving it empty may
+  // lead to undesired cookie blocking. Third-party cookie blocking can be
+  // bypassed by setting first_party_for_cookies = url, but this should ideally
+  // only be done if there really is no way to determine the correct value.
+  GURL first_party_for_cookies;
+
+  // The referrer to use (may be empty).
+  GURL referrer;
+
+  // The origin of the frame that is associated with this request.  This is used
+  // to update our insecure content state.
+  std::string frame_origin;
+
+  // The origin of the main frame (top-level frame) that is associated with this
+  // request.  This is used to update our insecure content state.
+  std::string main_frame_origin;
+
+  // Additional HTTP request headers.
+  std::string headers;
+
+  // URLRequest load flags (0 by default).
+  int load_flags;
+
+  // Unique ID of process that originated this request. For normal renderer
+  // requests, this will be the ID of the renderer. For plugin requests routed
+  // through the renderer, this will be the plugin's ID.
+  int origin_child_id;
+
+  // What this resource load is for (main frame, sub-frame, sub-resource,
+  // object).
+  ResourceType::Type resource_type;
+
+  // Used by plugin->browser requests to get the correct URLRequestContext.
+  uint32 request_context;
+
+  // Indicates which frame (or worker context) the request is being loaded into,
+  // or kNoHostId.
+  int appcache_host_id;
+
+  // Optional upload data (may be null).
+  scoped_refptr<net::UploadData> upload_data;
+
+  bool download_to_file;
+
+  // The following two members are specified if the request is initiated by
+  // a plugin like Gears.
+
+  // Contains the id of the host renderer.
+  int host_renderer_id;
+
+  // Contains the id of the host render view.
+  int host_render_view_id;
+};
+
+// Parameters for a render request.
+struct ViewMsg_Print_Params {
+  // Physical size of the page, including non-printable margins,
+  // in pixels according to dpi.
+  gfx::Size page_size;
+
+  // In pixels according to dpi_x and dpi_y.
+  gfx::Size printable_size;
+
+  // The y-offset of the printable area, in pixels according to dpi.
+  int margin_top;
+
+  // The x-offset of the printable area, in pixels according to dpi.
+  int margin_left;
+
+  // Specifies dots per inch.
+  double dpi;
+
+  // Minimum shrink factor. See PrintSettings::min_shrink for more information.
+  double min_shrink;
+
+  // Maximum shrink factor. See PrintSettings::max_shrink for more information.
+  double max_shrink;
+
+  // Desired apparent dpi on paper.
+  int desired_dpi;
+
+  // Cookie for the document to ensure correctness.
+  int document_cookie;
+
+  // Should only print currently selected text.
+  bool selection_only;
+
+  // Warning: do not compare document_cookie.
+  bool Equals(const ViewMsg_Print_Params& rhs) const;
+
+  // Checking if the current params is empty. Just initialized after a memset.
+  bool IsEmpty() const;
+};
+
+struct ViewMsg_PrintPage_Params {
+  // Parameters to render the page as a printed page. It must always be the same
+  // value for all the document.
+  ViewMsg_Print_Params params;
+
+  // The page number is the indicator of the square that should be rendered
+  // according to the layout specified in ViewMsg_Print_Params.
+  int page_number;
+};
+
+struct ViewMsg_PrintPages_Params {
+  // Parameters to render the page as a printed page. It must always be the same
+  // value for all the document.
+  ViewMsg_Print_Params params;
+
+  // If empty, this means a request to render all the printed pages.
+  std::vector<int> pages;
+};
+
+// Parameters to describe a rendered page.
+struct ViewHostMsg_DidPrintPage_Params {
+  // A shared memory handle to the EMF data. This data can be quite large so a
+  // memory map needs to be used.
+  base::SharedMemoryHandle metafile_data_handle;
+
+  // Size of the metafile data.
+  uint32 data_size;
+
+  // Cookie for the document to ensure correctness.
+  int document_cookie;
+
+  // Page number.
+  int page_number;
+
+  // Shrink factor used to render this page.
+  double actual_shrink;
+
+  // The size of the page the page author specified.
+  gfx::Size page_size;
+
+  // The printable area the page author specified.
+  gfx::Rect content_area;
+
+  // True if the page has visible overlays.
+  bool has_visible_overlays;
+};
+
+// Parameters for creating an audio output stream.
+struct ViewHostMsg_Audio_CreateStream_Params {
+  // Format request for the stream.
+  AudioManager::Format format;
+
+  // Number of channels.
+  int channels;
+
+  // Sampling rate (frequency) of the output stream.
+  int sample_rate;
+
+  // Number of bits per sample;
+  int bits_per_sample;
+
+  // Number of bytes per packet. Determines the maximum number of bytes
+  // transported for each audio packet request.
+  // A value of 0 means that the audio packet size is selected automatically
+  // by the browser process.
+  uint32 packet_size;
+};
+
+// This message is used for supporting popup menus on Mac OS X using native
+// Cocoa controls. The renderer sends us this message which we use to populate
+// the popup menu.
+struct ViewHostMsg_ShowPopup_Params {
+  // Position on the screen.
+  gfx::Rect bounds;
+
+  // The height of each item in the menu.
+  int item_height;
+
+  // The size of the font to use for those items.
+  double item_font_size;
+
+  // The currently selected (displayed) item in the menu.
+  int selected_item;
+
+  // The entire list of items in the popup menu.
+  std::vector<WebMenuItem> popup_items;
+
+  // Whether items should be right-aligned.
+  bool right_aligned;
+};
+
+// Parameters for the IPC message ViewHostMsg_ScriptedPrint
+struct ViewHostMsg_ScriptedPrint_Params {
+  int routing_id;
+  gfx::NativeViewId host_window_id;
+  int cookie;
+  int expected_pages_count;
+  bool has_selection;
+  bool use_overlays;
+};
+
+// Signals a storage event.
+struct ViewMsg_DOMStorageEvent_Params {
+  // The key that generated the storage event.  Null if clear() was called.
+  NullableString16 key_;
+
+  // The old value of this key.  Null on clear() or if it didn't have a value.
+  NullableString16 old_value_;
+
+  // The new value of this key.  Null on removeItem() or clear().
+  NullableString16 new_value_;
+
+  // The origin this is associated with.
+  string16 origin_;
+
+  // The URL of the page that caused the storage event.
+  GURL url_;
+
+  // The storage type of this event.
+  DOMStorageType storage_type_;
+};
+
+// Used to open an indexed database.
+struct ViewHostMsg_IDBFactoryOpen_Params {
+  // The routing ID of the view initiating the open.
+  int32 routing_id_;
+
+  // The response should have this id.
+  int32 response_id_;
+
+  // The origin doing the initiating.
+  string16 origin_;
+
+  // The name of the database.
+  string16 name_;
+
+  // The description of the database.
+  string16 description_;
+};
+
+// Used to create an object store.
+struct ViewHostMsg_IDBDatabaseCreateObjectStore_Params {
+  // The response should have this id.
+  int32 response_id_;
+
+  // The name of the object store.
+  string16 name_;
+
+  // The keyPath of the object store.
+  NullableString16 key_path_;
+
+  // Whether the object store created should have a key generator.
+  bool auto_increment_;
+
+  // The database the object store belongs to.
+  int32 idb_database_id_;
+};
+
+// Used to create an index.
+struct ViewHostMsg_IDBObjectStoreCreateIndex_Params {
+  // The response should have this id.
+  int32 response_id_;
+
+  // The name of the index.
+  string16 name_;
+
+  // The keyPath of the index.
+  NullableString16 key_path_;
+
+  // Whether the index created has unique keys.
+  bool unique_;
+
+  // The object store the index belongs to.
+  int32 idb_object_store_id_;
+};
+
+// Used to open an IndexedDB cursor.
+struct ViewHostMsg_IDBObjectStoreOpenCursor_Params {
+  // The response should have this id.
+  int32 response_id_;
+  // The serialized left key.
+  IndexedDBKey left_key_;
+  // The serialized right key.
+  IndexedDBKey right_key_;
+  // The key flags.
+  int32 flags_;
+  // The direction of this cursor.
+  int32 direction_;
+  // The object store the index belongs to.
+  int32 idb_object_store_id_;
+};
+
+// Allows an extension to execute code in a tab.
+struct ViewMsg_ExecuteCode_Params {
+  ViewMsg_ExecuteCode_Params();
+  ViewMsg_ExecuteCode_Params(int request_id, const std::string& extension_id,
+                             const std::vector<URLPattern>& host_permissions,
+                             bool is_javascript, const std::string& code,
+                             bool all_frames);
+
+  // The extension API request id, for responding.
+  int request_id;
+
+  // The ID of the requesting extension. To know which isolated world to
+  // execute the code inside of.
+  std::string extension_id;
+
+  // The host permissions of the requesting extension. So that we can check them
+  // right before injecting, to avoid any race conditions.
+  std::vector<URLPattern> host_permissions;
+
+  // Whether the code is JavaScript or CSS.
+  bool is_javascript;
+
+  // String of code to execute.
+  std::string code;
+
+  // Whether to inject into all frames, or only the root frame.
+  bool all_frames;
+};
+
+// Parameters for the message that creates a worker thread.
+struct ViewHostMsg_CreateWorker_Params {
+  // URL for the worker script.
+  GURL url;
+
+  // True if this is a SharedWorker, false if it is a dedicated Worker.
+  bool is_shared;
+
+  // Name for a SharedWorker, otherwise empty string.
+  string16 name;
+
+  // The ID of the parent document (unique within parent renderer).
+  unsigned long long document_id;
+
+  // RenderView routing id used to send messages back to the parent.
+  int render_view_route_id;
+
+  // The route ID to associate with the worker. If MSG_ROUTING_NONE is passed,
+  // a new unique ID is created and assigned to the worker.
+  int route_id;
+
+  // The ID of the parent's appcache host, only valid for dedicated workers.
+  int parent_appcache_host_id;
+
+  // The ID of the appcache the main shared worker script resource was loaded
+  // from, only valid for shared workers.
+  int64 script_resource_appcache_id;
+};
+
+// Parameters for the message that creates a desktop notification.
+struct ViewHostMsg_ShowNotification_Params {
+  // URL which is the origin that created this notification.
+  GURL origin;
+
+  // True if this is HTML
+  bool is_html;
+
+  // URL which contains the HTML contents (if is_html is true), otherwise empty.
+  GURL contents_url;
+
+  // Contents of the notification if is_html is false.
+  GURL icon_url;
+  string16 title;
+  string16 body;
+
+  // Directionality of the notification.
+  WebKit::WebTextDirection direction;
+
+  // ReplaceID if this notification should replace an existing one; may be
+  // empty if no replacement is called for.
+  string16 replace_id;
+
+  // Notification ID for sending events back for this notification.
+  int notification_id;
+};
+
+// Creates a new view via a control message since the view doesn't yet exist.
+struct ViewMsg_New_Params {
+  // The parent window's id.
+  gfx::NativeViewId parent_window;
+
+  // Renderer-wide preferences.
+  RendererPreferences renderer_preferences;
+
+  // Preferences for this view.
+  WebPreferences web_preferences;
+
+  // The ID of the view to be created.
+  int32 view_id;
+
+  // The session storage namespace ID this view should use.
+  int64 session_storage_namespace_id;
+
+  // The name of the frame associated with this view (or empty if none).
+  string16 frame_name;
+};
+
+struct ViewHostMsg_CreateWindow_Params {
+  // Routing ID of the view initiating the open.
+  int opener_id;
+
+  // True if this open request came in the context of a user gesture.
+  bool user_gesture;
+
+  // Type of window requested.
+  WindowContainerType window_container_type;
+
+  // The session storage namespace ID this view should use.
+  int64 session_storage_namespace_id;
+
+  // The name of the resulting frame that should be created (empty if none
+  // has been specified).
+  string16 frame_name;
+};
+
+struct ViewHostMsg_RunFileChooser_Params {
+  enum Mode {
+    // Requires that the file exists before allowing the user to pick it.
+    Open,
+
+    // Like Open, but allows picking multiple files to open.
+    OpenMultiple,
+
+    // Like Open, but selects a folder.
+    OpenFolder,
+
+    // Allows picking a nonexistent file, and prompts to overwrite if the file
+    // already exists.
+    Save,
+  };
+
+  Mode mode;
+
+  // Title to be used for the dialog. This may be empty for the default title,
+  // which will be either "Open" or "Save" depending on the mode.
+  string16 title;
+
+  // Default file name to select in the dialog.
+  FilePath default_file_name;
+};
+
+struct ViewMsg_ExtensionExtentInfo {
+  std::string extension_id;
+  ExtensionExtent web_extent;
+  ExtensionExtent browse_extent;
+};
+
+struct ViewMsg_ExtensionExtentsUpdated_Params {
+  // Describes the installed extension apps and the URLs they cover.
+  std::vector<ViewMsg_ExtensionExtentInfo> extension_apps;
+};
+
+struct ViewMsg_DeviceOrientationUpdated_Params {
+  // These fields have the same meaning as in device_orientation::Orientation.
+  bool can_provide_alpha;
+  double alpha;
+  bool can_provide_beta;
+  double beta;
+  bool can_provide_gamma;
+  double gamma;
+};
+
+// Parameters structure for ViewHostMsg_ExtensionRequest.
+struct ViewHostMsg_DomMessage_Params {
+  // Message name.
+  std::string name;
+
+  // List of message arguments.
+  ListValue arguments;
+
+  // URL of the frame request was sent from.
+  GURL source_url;
+
+  // Unique request id to match requests and responses.
+  int request_id;
+
+  // True if request has a callback specified.
+  bool has_callback;
+
+  // True if request is executed in response to an explicit user gesture.
+  bool user_gesture;
+};
+
+struct ViewHostMsg_OpenFileSystemRequest_Params {
+  // The routing ID of the view initiating the request.
+  int routing_id;
+
+  // The response should have this id.
+  int request_id;
+
+  // The origin doing the initiating.
+  GURL origin_url;
+
+  // The requested FileSystem type.
+  WebKit::WebFileSystem::Type type;
+
+  // Indicates how much storage space (in bytes) the caller expects to need.
+  int64 requested_size;
+};
+
+namespace IPC {
+
+class Message;
+
+// Traits for ViewMsg_Navigate_Params structure to pack/unpack.
+template <>
+struct ParamTraits<ViewMsg_Navigate_Params> {
+  typedef ViewMsg_Navigate_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_AudioStreamState_Params> {
+  typedef ViewMsg_AudioStreamState_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_StopFinding_Params> {
+  typedef ViewMsg_StopFinding_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_GetSearchProviderInstallState_Params> {
+  typedef ViewHostMsg_GetSearchProviderInstallState_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_FrameNavigate_Params> {
+  typedef ViewHostMsg_FrameNavigate_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_UpdateRect_Params> {
+  typedef ViewHostMsg_UpdateRect_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_ClosePage_Params> {
+  typedef ViewMsg_ClosePage_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_Resource_Request> {
+  typedef ViewHostMsg_Resource_Request param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* r);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_Print_Params> {
+  typedef ViewMsg_Print_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_PrintPage_Params> {
+  typedef ViewMsg_PrintPage_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_PrintPages_Params> {
+  typedef ViewMsg_PrintPages_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_DidPrintPage_Params> {
+  typedef ViewHostMsg_DidPrintPage_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_Audio_CreateStream_Params> {
+  typedef ViewHostMsg_Audio_CreateStream_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_ShowPopup_Params> {
+  typedef ViewHostMsg_ShowPopup_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_ScriptedPrint_Params> {
+  typedef ViewHostMsg_ScriptedPrint_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_DOMStorageEvent_Params> {
+  typedef ViewMsg_DOMStorageEvent_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_IDBFactoryOpen_Params> {
+  typedef ViewHostMsg_IDBFactoryOpen_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_IDBDatabaseCreateObjectStore_Params> {
+  typedef ViewHostMsg_IDBDatabaseCreateObjectStore_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_IDBObjectStoreCreateIndex_Params> {
+  typedef ViewHostMsg_IDBObjectStoreCreateIndex_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_IDBObjectStoreOpenCursor_Params> {
+  typedef ViewHostMsg_IDBObjectStoreOpenCursor_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
+struct ParamTraits<ViewMsg_ExecuteCode_Params> {
+  typedef ViewMsg_ExecuteCode_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_CreateWorker_Params> {
+  typedef ViewHostMsg_CreateWorker_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_ShowNotification_Params> {
+  typedef ViewHostMsg_ShowNotification_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type &p, std::string* l);
+};
+
+template<>
+struct ParamTraits<ViewMsg_New_Params> {
+  typedef ViewMsg_New_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
+struct ParamTraits<ViewHostMsg_CreateWindow_Params> {
+  typedef ViewHostMsg_CreateWindow_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template<>
+struct ParamTraits<ViewHostMsg_RunFileChooser_Params> {
+  typedef ViewHostMsg_RunFileChooser_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_ExtensionExtentInfo> {
+  typedef ViewMsg_ExtensionExtentInfo param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_ExtensionExtentsUpdated_Params> {
+  typedef ViewMsg_ExtensionExtentsUpdated_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewMsg_DeviceOrientationUpdated_Params> {
+  typedef ViewMsg_DeviceOrientationUpdated_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_DomMessage_Params> {
+  typedef ViewHostMsg_DomMessage_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+template <>
+struct ParamTraits<ViewHostMsg_OpenFileSystemRequest_Params> {
+  typedef ViewHostMsg_OpenFileSystemRequest_Params param_type;
+  static void Write(Message* m, const param_type& p);
+  static bool Read(const Message* m, void** iter, param_type* p);
+  static void Log(const param_type& p, std::string* l);
+};
+
+}  // namespace IPC
+
+#endif  // CHROME_COMMON_RENDER_MESSAGES_PARAMS_H_