Bug 1520929 - part 2 - send isWowARM64 through telemetry; r=chutten,data-review=chutten

toolkit/components/telemetry/app/TelemetryEnvironment.jsm

@@ -1832,6 +1832,7 @@ EnvironmentCache.prototype = {
 
     if (AppConstants.platform === "win") {
       data.isWow64 = getSysinfoProperty("isWow64", null);
+      data.isWowARM64 = getSysinfoProperty("isWowARM64", null);
     } else if (AppConstants.platform == "android") {
       data.device = this._getDeviceData();
     }

toolkit/components/telemetry/docs/data/environment.rst

@@ -99,6 +99,7 @@ Structure:
         memoryMB: <number>,
         virtualMaxMB: <number>, // windows-only
         isWow64: <bool>, // windows-only
+	isWowARM64: <bool>, // windows-only
         cpu: {
             count: <number>,  // desktop only, e.g. 8, or null on failure - logical cpus
             cores: <number>, // desktop only, e.g., 4, or null on failure - physical cores

toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js

@@ -548,6 +548,8 @@ function checkSystemSection(data) {
     if (gIsWindows) {
       Assert.equal(typeof data.system.isWow64, "boolean",
              "isWow64 must be available on Windows and have the correct type.");
+      Assert.equal(typeof data.system.isWowARM64, "boolean",
+             "isWowARM64 must be available on Windows and have the correct type.");
       Assert.ok("virtualMaxMB" in data.system, "virtualMaxMB must be available.");
       Assert.ok(Number.isFinite(data.system.virtualMaxMB),
                 "virtualMaxMB must be a number.");