[Chromoting] Implements remoting.TelemetryEventWriter

This change implements remoting.TelemetryEventWriter.  The TelemetryEventWriter
has two components:
a) a Service that runs in the background page
b) Client static methods that can be called from any page.

When a session starts, the client calls Client.startSession(windowId, sessionId).
Internally, the service will keep track of a mapping from window id to
ongoing sessions.  In this way, if a session is dropped (the user closes the window via
the system context menu) unexpectedly, the Service can detect that and automatically
log the session close event.

BUG=497268

Review URL: https://codereview.chromium.org/1203793002

Cr-Commit-Position: refs/heads/master@{#336257}

2 files changed, 24 insertions, 2 deletions

diff --git a/remoting/webapp/js_proto/chrome_mocks.js b/remoting/webapp/js_proto/chrome_mocks.js
index af4c178..5069b73 100644
--- a/remoting/webapp/js_proto/chrome_mocks.js
+++ b/remoting/webapp/js_proto/chrome_mocks.js
@@ -76,6 +76,10 @@ chromeMocks.runtime.Port.prototype.postMessage = function(message) {};
 /** @type {chromeMocks.Event} */
 chromeMocks.runtime.onMessage = new chromeMocks.Event();
 
+
+/** @type {chromeMocks.Event} */
+chromeMocks.runtime.onSuspend = new chromeMocks.Event();
+
 /**
  * @param {string?} extensionId
  * @param {*} message
@@ -121,6 +125,14 @@ chromeMocks.runtime.lastError = {
   message: undefined
 };
 
+chromeMocks.runtime.getManifest = function() {
+  return {
+    version: 10,
+    app: {
+      background: true
+    }
+  };
+};
 
 // Sample implementation of chrome.StorageArea according to
 // https://developer.chrome.com/apps/storage#type-StorageArea
@@ -251,10 +263,12 @@ chromeMocks.I18n.prototype.getMessage = function(messageName, opt_args) {};
 chromeMocks.I18n.prototype.getUILanguage = function() {};
 
 /** @constructor */
-chromeMocks.WindowManager = function() {};
+chromeMocks.WindowManager = function() {
+  this.current_ = new chromeMocks.AppWindow();
+};
 
 chromeMocks.WindowManager.prototype.current = function() {
-  return new chromeMocks.AppWindow();
+  return this.current_;
 };
 
 /** @constructor */
diff --git a/remoting/webapp/js_proto/sinon_proto.js b/remoting/webapp/js_proto/sinon_proto.js
index 8641a82..e24bd31 100644
--- a/remoting/webapp/js_proto/sinon_proto.js
+++ b/remoting/webapp/js_proto/sinon_proto.js
@@ -34,6 +34,9 @@ sinon.Expectation = function() {};
 /** @return {sinon.Expectation} */
 sinon.Expectation.prototype.once = function() {};
 
+/** @return {sinon.Expectation} */
+sinon.Expectation.prototype.never = function() {};
+
 /**
  * @param {...} data
  * @return {sinon.Expectation}
@@ -66,6 +69,11 @@ sinon.Mock.prototype.expects = function(method) {};
  */
 sinon.Mock.prototype.restore = function() {};
 
+/**
+ * @return {boolean}
+ */
+sinon.Mock.prototype.verify = function() {};
+
 /** @type {function(...):Function} */
 sinon.spy = function() {};