Some snapshot-specific fixes/improvements.

console/console.ts

@@ -286,6 +286,11 @@ export class Console implements definition.Console {
     }
 
     private logMessage(message: string, messageType: number): void {
+        if (!global.android) {
+            // This case may be entered during heap snapshot where the global.android is not present
+            return;
+        }
+
         var arrayToLog = [];
         if (message.length > 4000) {
             var i;

globals/globals.ts

@@ -6,6 +6,9 @@ global.moduleMerge = function (sourceExports: any, destExports: any) {
     }
 }
 
+import * as timerModule from "timer";
+import * as dialogsModule from "ui/dialogs";
+
 type ModuleLoader = () => any;
 const modules: Map<string, ModuleLoader> = new Map<string, ModuleLoader>();
 
@@ -54,16 +57,37 @@ function registerOnGlobalContext(name: string, module: string): void {
     });
 }
 
-registerOnGlobalContext("setTimeout", "timer");
-registerOnGlobalContext("clearTimeout", "timer");
-registerOnGlobalContext("setInterval", "timer");
-registerOnGlobalContext("clearInterval", "timer");
-registerOnGlobalContext("alert", "ui/dialogs");
-registerOnGlobalContext("confirm", "ui/dialogs");
-registerOnGlobalContext("prompt", "ui/dialogs");
-registerOnGlobalContext("XMLHttpRequest", "xhr");
-registerOnGlobalContext("FormData", "xhr");
-registerOnGlobalContext("fetch", "fetch");
+if (global.__snapshot) {
+    // when we have a snapshot, it is better to pre-populate these on the global context to get them saved within the blob
+    var timer: typeof timerModule = require("timer");
+    global.setTimeout = timer.setTimeout;
+    global.clearTimeout = timer.clearTimeout;
+    global.setInterval = timer.setInterval;
+    global.clearInterval = timer.clearInterval;
+
+    var dialogs: typeof dialogsModule = require("ui/dialogs");
+    global.alert = dialogs.alert;
+    global.confirm = dialogs.confirm;
+    global.prompt = dialogs.prompt;
+
+    var xhr = require("xhr");
+    global.XMLHttpRequest = xhr.XMLHttpRequest;
+    global.FormData = xhr.FormData;
+
+    var fetch = require("fetch");
+    global.fetch = fetch.fetch;
+} else {
+    registerOnGlobalContext("setTimeout", "timer");
+    registerOnGlobalContext("clearTimeout", "timer");
+    registerOnGlobalContext("setInterval", "timer");
+    registerOnGlobalContext("clearInterval", "timer");
+    registerOnGlobalContext("alert", "ui/dialogs");
+    registerOnGlobalContext("confirm", "ui/dialogs");
+    registerOnGlobalContext("prompt", "ui/dialogs");
+    registerOnGlobalContext("XMLHttpRequest", "xhr");
+    registerOnGlobalContext("FormData", "xhr");
+    registerOnGlobalContext("fetch", "fetch");
+}
 
 import platform = require("platform");
 import consoleModule = require("console");
@@ -107,7 +131,6 @@ export function Deprecated(target: Object, key?: string | symbol, descriptor?: a
 
         return descriptor;
     } else {
-
         console.log(`${(target && (<any>target).name || target)} is deprecated`);
         return target;
     }

xml/xml.ts

@@ -83,6 +83,11 @@ function _generateAmpMap(): any {
     return ampCodes;
 }
 
+// android-specific implementation, which pre-populates the map to get it saved into the heap blob
+if (global.__snapshot) {
+    _ampCodes = _generateAmpMap();
+}
+
 function _HandleAmpEntities(found: string, decimalValue: string, hexValue: string, wordValue: string): string {
 
     if (wordValue) {