Adding Maps page to page_sets for telemetry.

tools/telemetry/telemetry/page/actions/drag.js

+// Copyright 2015 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 file provides the DragAction object, which performs drag on a page
+// using given start and end positions:
+//   1. var action = new __DragAction(callback)
+//   2. action.start(drag_options)
+'use strict';
+
+(function() {
+  function DragGestureOptions(opt_options) {
+      this.element_ = opt_options.element;
+      this.left_start_ratio_ = opt_options.left_start_ratio;
+      this.top_start_ratio_ = opt_options.top_start_ratio;
+      this.left_end_ratio_ = opt_options.left_end_ratio;
+      this.top_end_ratio_ = opt_options.top_end_ratio;
+      this.speed_ = opt_options.speed;
+      this.gesture_source_type_ = opt_options.gesture_source_type;
+  }
+
+  function supportedByBrowser() {
+    return !!(window.chrome &&
+              chrome.gpuBenchmarking &&
+              chrome.gpuBenchmarking.smoothDrag);
+  }
+
+  // This class performs drag action using given start and end positions,
+  // by a single drag gesture.
+  function DragAction(opt_callback) {
+    this.beginMeasuringHook = function() {}
+    this.endMeasuringHook = function() {}
+
+    this.callback_ = opt_callback;
+  }
+
+  DragAction.prototype.start = function(opt_options) {
+    this.options_ = new DragGestureOptions(opt_options);
+    requestAnimationFrame(this.startGesture_.bind(this));
+  };
+
+  DragAction.prototype.startGesture_ = function() {
+    this.beginMeasuringHook();
+
+    var rect = __GestureCommon_GetBoundingVisibleRect(this.options_.element_);
+    var start_left =
+        rect.left + (rect.width * this.options_.left_start_ratio_);
+    var start_top =
+        rect.top + (rect.height * this.options_.top_start_ratio_);
+    var end_left =
+        rect.left + (rect.width * this.options_.left_end_ratio_);
+    var end_top =
+        rect.top + (rect.height * this.options_.top_end_ratio_);
+    chrome.gpuBenchmarking.smoothDrag(
+        start_left, start_top, end_left, end_top,
+        this.onGestureComplete_.bind(this), this.options_.gesture_source_type_,
+        this.options_.speed_);
+  };
+
+  DragAction.prototype.onGestureComplete_ = function() {
+    this.endMeasuringHook();
+
+    // We're done.
+    if (this.callback_)
+      this.callback_();
+  };
+
+  window.__DragAction = DragAction;
+  window.__DragAction_SupportedByBrowser = supportedByBrowser;
+})();