Enable extension APIs for content scripts.

chrome/renderer/resources/extensions/renderer_process_bindings.js

Index: chrome/renderer/resources/extensions/renderer_process_bindings.js
diff --git a/chrome/renderer/resources/extensions/renderer_process_bindings.js b/chrome/renderer/resources/extensions/renderer_process_bindings.js
deleted file mode 100644
index 0d939b14ddd3eba717f9b8cc855f75eb39cec250..0000000000000000000000000000000000000000
--- a/chrome/renderer/resources/extensions/renderer_process_bindings.js
+++ /dev/null
@@ -1,386 +0,0 @@
-// Copyright (c) 2011 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.
-
-// This script contains unprivileged javascript APIs related to chrome
-// extensions.  It is loaded by any extension-related context, such as content
-// scripts or background pages.
-// See user_script_slave.cc for script that is loaded by content scripts only.
-// TODO(mpcomplete): we also load this in regular web pages, but don't need to.
-
-var chrome = chrome || {};
-(function () {
-  native function OpenChannelToExtension(sourceId, targetId, name);
-  native function CloseChannel(portId, notifyBrowser);
-  native function PortAddRef(portId);
-  native function PortRelease(portId);
-  native function PostMessage(portId, msg);
-  native function GetChromeHidden();
-  native function GetL10nMessage();
-  native function Print();
-
-  var chromeHidden = GetChromeHidden();
-
-  // The reserved channel name for the sendRequest API.
-  chromeHidden.kRequestChannel = "chrome.extension.sendRequest";
-
-  // Map of port IDs to port object.
-  var ports = {};
-
-  // Map of port IDs to chromeHidden.onUnload listeners. Keep track of these
-  // to free the onUnload listeners when ports are closed.
-  var portReleasers = {};
-
-  // Change even to odd and vice versa, to get the other side of a given
-  // channel.
-  function getOppositePortId(portId) { return portId ^ 1; }
-
-  // Port object.  Represents a connection to another script context through
-  // which messages can be passed.
-  chrome.Port = function(portId, opt_name) {
-    this.portId_ = portId;
-    this.name = opt_name;
-    this.onDisconnect = new chrome.Event();
-    this.onMessage = new chrome.Event();
-  };
-
-  chromeHidden.Port = {};
-
-  // Returns true if the specified port id is in this context. This is used by
-  // the C++ to avoid creating the javascript message for all the contexts that
-  // don't care about a particular message.
-  chromeHidden.Port.hasPort = function(portId) {
-    return portId in ports;
-  };
-
-  // Hidden port creation function.  We don't want to expose an API that lets
-  // people add arbitrary port IDs to the port list.
-  chromeHidden.Port.createPort = function(portId, opt_name) {
-    if (ports[portId]) {
-      throw new Error("Port '" + portId + "' already exists.");
-    }
-    var port = new chrome.Port(portId, opt_name);
-    ports[portId] = port;
-    portReleasers[portId] = PortRelease.bind(this, portId);
-    chromeHidden.onUnload.addListener(portReleasers[portId]);
-
-    PortAddRef(portId);
-    return port;
-  };
-
-  // Called by native code when a channel has been opened to this context.
-  chromeHidden.Port.dispatchOnConnect = function(portId, channelName, tab,
-                                                 sourceExtensionId,
-                                                 targetExtensionId) {
-    // Only create a new Port if someone is actually listening for a connection.
-    // In addition to being an optimization, this also fixes a bug where if 2
-    // channels were opened to and from the same process, closing one would
-    // close both.
-    if (targetExtensionId != chromeHidden.extensionId)
-      return;  // not for us
-    if (ports[getOppositePortId(portId)])
-      return;  // this channel was opened by us, so ignore it
-
-    // Determine whether this is coming from another extension, so we can use
-    // the right event.
-    var isExternal = sourceExtensionId != chromeHidden.extensionId;
-
-    if (tab)
-      tab = chromeHidden.JSON.parse(tab);
-    var sender = {tab: tab, id: sourceExtensionId};
-
-    // Special case for sendRequest/onRequest.
-    if (channelName == chromeHidden.kRequestChannel) {
-      var requestEvent = (isExternal ?
-          chrome.extension.onRequestExternal : chrome.extension.onRequest);
-      if (requestEvent.hasListeners()) {
-        var port = chromeHidden.Port.createPort(portId, channelName);
-        port.onMessage.addListener(function(request) {
-          requestEvent.dispatch(request, sender, function(response) {
-            if (port) {
-              port.postMessage(response);
-              port = null;
-            } else {
-              // We nulled out port when sending the response, and now the page
-              // is trying to send another response for the same request.
-              var errorMsg =
-                  "Cannot send a response more than once per " +
-                  "chrome.extension.onRequest listener per document (message " +
-                  "was sent by extension " + sourceExtensionId;
-              if (sourceExtensionId != targetExtensionId) {
-                errorMsg += " for extension " + targetExtensionId;
-              }
-              errorMsg += ").";
-              chrome.extension.lastError = {"message": errorMsg};
-              console.error("Could not send response: " + errorMsg);
-            }
-          });
-        });
-      }
-      return;
-    }
-
-    var connectEvent = (isExternal ?
-        chrome.extension.onConnectExternal : chrome.extension.onConnect);
-    if (connectEvent.hasListeners()) {
-      var port = chromeHidden.Port.createPort(portId, channelName);
-      port.sender = sender;
-      // TODO(EXTENSIONS_DEPRECATED): port.tab is obsolete.
-      port.tab = port.sender.tab;
-
-      connectEvent.dispatch(port);
-    }
-  };
-
-  // Called by native code when a channel has been closed.
-  chromeHidden.Port.dispatchOnDisconnect = function(
-      portId, connectionInvalid) {
-    var port = ports[portId];
-    if (port) {
-      // Update the renderer's port bookkeeping, without notifying the browser.
-      CloseChannel(portId, false);
-      if (connectionInvalid) {
-        var errorMsg =
-            "Could not establish connection. Receiving end does not exist.";
-        chrome.extension.lastError = {"message": errorMsg};
-        console.error("Port error: " + errorMsg);
-      }
-      try {
-        port.onDisconnect.dispatch(port);
-      } finally {
-        port.destroy_();
-        delete chrome.extension.lastError;
-      }
-    }
-  };
-
-  // Called by native code when a message has been sent to the given port.
-  chromeHidden.Port.dispatchOnMessage = function(msg, portId) {
-    var port = ports[portId];
-    if (port) {
-      if (msg) {
-        msg = chromeHidden.JSON.parse(msg);
-      }
-      port.onMessage.dispatch(msg, port);
-    }
-  };
-
-  // Sends a message asynchronously to the context on the other end of this
-  // port.
-  chrome.Port.prototype.postMessage = function(msg) {
-    // JSON.stringify doesn't support a root object which is undefined.
-    if (msg === undefined)
-      msg = null;
-    PostMessage(this.portId_, chromeHidden.JSON.stringify(msg));
-  };
-
-  // Disconnects the port from the other end.
-  chrome.Port.prototype.disconnect = function() {
-    CloseChannel(this.portId_, true);
-    this.destroy_();
-  };
-
-  chrome.Port.prototype.destroy_ = function() {
-    var portId = this.portId_;
-
-    this.onDisconnect.destroy_();
-    this.onMessage.destroy_();
-
-    PortRelease(portId);
-    chromeHidden.onUnload.removeListener(portReleasers[portId]);
-
-    delete ports[portId];
-    delete portReleasers[portId];
-  };
-
-  // This function is called on context initialization for both content scripts
-  // and extension contexts.
-  chromeHidden.onLoad.addListener(function(extensionId, isExtensionProcess,
-                                           inIncognitoContext) {
-    chromeHidden.extensionId = extensionId;
-
-    chrome.extension = chrome.extension || {};
-    chrome.self = chrome.extension;
-
-    chrome.extension.inIncognitoTab = inIncognitoContext;  // deprecated
-    chrome.extension.inIncognitoContext = inIncognitoContext;
-
-    // Events for when a message channel is opened to our extension.
-    chrome.extension.onConnect = new chrome.Event();
-    chrome.extension.onConnectExternal = new chrome.Event();
-    chrome.extension.onRequest = new chrome.Event();
-    chrome.extension.onRequestExternal = new chrome.Event();
-
-    // Opens a message channel to the given target extension, or the current one
-    // if unspecified.  Returns a Port for message passing.
-    chrome.extension.connect = function(targetId_opt, connectInfo_opt) {
-      var name = "";
-      var targetId = extensionId;
-      var nextArg = 0;
-      if (typeof(arguments[nextArg]) == "string")
-        targetId = arguments[nextArg++];
-      if (typeof(arguments[nextArg]) == "object")
-        name = arguments[nextArg++].name || name;
-      if (nextArg != arguments.length)
-        throw new Error("Invalid arguments to connect.");
-
-      var portId = OpenChannelToExtension(extensionId, targetId, name);
-      if (portId >= 0)
-        return chromeHidden.Port.createPort(portId, name);
-      throw new Error("Error connecting to extension '" + targetId + "'");
-    };
-
-    chrome.extension.sendRequest =
-        function(targetId_opt, request, responseCallback_opt) {
-      var targetId = extensionId;
-      var responseCallback = null;
-      var lastArg = arguments.length - 1;
-      if (typeof(arguments[lastArg]) == "function")
-        responseCallback = arguments[lastArg--];
-      request = arguments[lastArg--];
-      if (lastArg >= 0 && typeof(arguments[lastArg]) == "string")
-        targetId = arguments[lastArg--];
-      if (lastArg != -1)
-        throw new Error("Invalid arguments to sendRequest.");
-
-      var port = chrome.extension.connect(targetId,
-                                          {name: chromeHidden.kRequestChannel});
-      port.postMessage(request);
-      port.onDisconnect.addListener(function() {
-        // For onDisconnects, we only notify the callback if there was an error
-        try {
-          if (chrome.extension.lastError && responseCallback)
-            responseCallback();
-        } finally {
-          port = null;
-        }
-      });
-      port.onMessage.addListener(function(response) {
-        try {
-          if (responseCallback)
-            responseCallback(response);
-        } finally {
-          port.disconnect();
-          port = null;
-        }
-      });
-    };
-
-    // Returns a resource URL that can be used to fetch a resource from this
-    // extension.
-    chrome.extension.getURL = function(path) {
-      path = String(path);
-      if (!path.length || path[0] != "/")
-        path = "/" + path;
-      return "chrome-extension://" + extensionId + path;
-    };
-
-    chrome.i18n = chrome.i18n || {};
-    chrome.i18n.getMessage = function(message_name, placeholders) {
-      return GetL10nMessage(message_name, placeholders, extensionId);
-    };
-
-    if (!isExtensionProcess)
-      setupApiStubs();
-  });
-
-  var notSupportedSuffix = " can only be used in extension processes. " +
-      "See the content scripts documentation for more details.";
-
-  // Setup to throw an error message when trying to access |name| on the chrome
-  // object. The |name| can be a dot-separated path.
-  function createStub(name) {
-    var module = chrome;
-    var parts = name.split(".");
-    for (var i = 0; i < parts.length - 1; i++) {
-      var nextPart = parts[i];
-      // Make sure an object at the path so far is defined.
-      module[nextPart] = module[nextPart] || {};
-      module = module[nextPart];
-    }
-    var finalPart = parts[parts.length-1];
-    module.__defineGetter__(finalPart, function() {
-      throw new Error("chrome." + name + notSupportedSuffix);
-    });
-  }
-
-  // Sets up stubs to throw a better error message for the common case of
-  // developers trying to call extension API's that aren't allowed to be
-  // called from content scripts.
-  function setupApiStubs() {
-    // TODO(asargent) It would be nice to eventually generate this
-    // programmatically from extension_api.json (there is already a browser test
-    // that should prevent it from getting stale).
-    var privileged = [
-      // Entire namespaces.
-      "bookmarks",
-      "browserAction",
-      "chromeAuthPrivate",
-      "chromePrivate",
-      "chromeosInfoPrivate",
-      "contentSettings",
-      "contextMenus",
-      "cookies",
-      "devtools",
-      "experimental.accessibility",
-      "experimental.app",
-      "experimental.bookmarkManager",
-      "experimental.clear",
-      "experimental.clipboard",
-      "experimental.debugger",
-      "experimental.downloads",
-      "experimental.extension",
-      "experimental.infobars",
-      "experimental.input",
-      "experimental.inputUI",
-      "experimental.metrics",
-      "experimental.settings",
-      "experimental.popup",
-      "experimental.processes",
-      "experimental.privacy",
-      "experimental.rlz",
-      "experimental.savePage",
-      "experimental.sidebar",
-      "experimental.speechInput",
-      "experimental.topSites",
-      "experimental.webRequest",
-      "fileBrowserHandler",
-      "fileBrowserPrivate",
-      "fileSystem",
-      "history",
-      "idle",
-      "inputMethodPrivate",
-      "management",
-      "mediaPlayerPrivate",
-      "omnibox",
-      "pageAction",
-      "pageActions",
-      "permissions",
-      "proxy",
-      "tabs",
-      "test",
-      "tts",
-      "ttsEngine",
-      "types",
-      "webNavigation",
-      "webSocketProxyPrivate",
-      "webstorePrivate",
-      "windows",
-
-      // Functions/events/properties within the extension namespace.
-      "extension.getBackgroundPage",
-      "extension.getExtensionTabs",
-      "extension.getViews",
-      "extension.isAllowedIncognitoAccess",
-      "extension.isAllowedFileSchemeAccess",
-      "extension.onConnectExternal",
-      "extension.onRequestExternal",
-      "extension.setUpdateUrlData",
-      "i18n.getAcceptLanguages"
-    ];
-    for (var i = 0; i < privileged.length; i++) {
-      createStub(privileged[i]);
-    }
-  }
-
-})();