[DevTools] Separate ScreenCaptureModel out of ResourceTreeModel.

third_party/WebKit/Source/devtools/front_end/sdk/ScreenCaptureModel.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/ScreenCaptureModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/ScreenCaptureModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/ScreenCaptureModel.js
new file mode 100644
index 0000000000000000000000000000000000000000..9657b65c6257555dcbc6f2bc15774535ad197791
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/ScreenCaptureModel.js
@@ -0,0 +1,192 @@
+// Copyright 2017 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.
+
+/**
+ * @implements {Protocol.PageDispatcher}
+ */
+SDK.ScreenCaptureModel = class extends SDK.SDKModel {
+  /**
+   * @param {!SDK.Target} target
+   */
+  constructor(target) {
+    super(target);
+    this._agent = target.pageAgent();
+    /** @type {?function(string, !Protocol.Page.ScreencastFrameMetadata)} */
+    this._onScreencastFrame = null;
+    /** @type {?function(boolean)} */
+    this._onScreencastVisibilityChanged = null;
+    target.registerPageDispatcher(this);
+  }
+
+  /**
+   * @param {string} format
+   * @param {number} quality
+   * @param {number|undefined} width
+   * @param {number|undefined} height
+   * @param {number|undefined} everyNthFrame
+   * @param {function(string, !Protocol.Page.ScreencastFrameMetadata)} onFrame
+   * @param {function(boolean)} onVisibilityChanged
+   */
+  startScreencast(format, quality, width, height, everyNthFrame, onFrame, onVisibilityChanged) {
+    this._onScreencastFrame = onFrame;
+    this._onScreencastVisibilityChanged = onVisibilityChanged;
+    this._agent.startScreencast(format, quality, width, height, everyNthFrame);
+  }
+
+  stopScreencast() {
+    this._onScreencastFrame = null;
+    this._onScreencastVisibilityChanged = null;
+    this._agent.stopScreencast();
+  }
+
+  /**
+   * @param {string} format
+   * @param {number} quality
+   * @return {!Promise<?string>}
+   */
+  captureScreenshot(format, quality) {
+    var fulfill;
+    var promise = new Promise(callback => fulfill = callback);
+    this._agent.captureScreenshot(format, quality, (error, content) => {
+      if (error)
+        console.error(error);
+      fulfill(error ? null : content);
+    });
+    return promise;
+  }
+
+  /**
+   * @override
+   * @param {string} data
+   * @param {!Protocol.Page.ScreencastFrameMetadata} metadata
+   * @param {number} sessionId
+   */
+  screencastFrame(data, metadata, sessionId) {
+    this._agent.screencastFrameAck(sessionId);
+    if (this._onScreencastFrame)
+      this._onScreencastFrame.call(null, data, metadata);
+  }
+
+  /**
+   * @override
+   * @param {boolean} visible
+   */
+  screencastVisibilityChanged(visible) {
+    if (this._onScreencastVisibilityChanged)
+      this._onScreencastVisibilityChanged.call(null, visible);
+  }
+
+  /**
+   * @override
+   * @param {number} time
+   */
+  domContentEventFired(time) {
+  }
+
+  /**
+   * @override
+   * @param {number} time
+   */
+  loadEventFired(time) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.FrameId} frameId
+   * @param {!Protocol.Page.FrameId} parentFrameId
+   */
+  frameAttached(frameId, parentFrameId) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.Frame} frame
+   */
+  frameNavigated(frame) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.FrameId} frameId
+   */
+  frameDetached(frameId) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.FrameId} frameId
+   */
+  frameStartedLoading(frameId) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.FrameId} frameId
+   */
+  frameStoppedLoading(frameId) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.FrameId} frameId
+   * @param {number} delay
+   */
+  frameScheduledNavigation(frameId, delay) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.Page.FrameId} frameId
+   */
+  frameClearedScheduledNavigation(frameId) {
+  }
+
+  /**
+   * @override
+   */
+  frameResized() {
+  }
+
+  /**
+   * @override
+   * @param {string} message
+   * @param {string} dialogType
+   */
+  javascriptDialogOpening(message, dialogType) {
+  }
+
+  /**
+   * @override
+   * @param {boolean} result
+   */
+  javascriptDialogClosed(result) {
+  }
+
+  /**
+   * @override
+   * @param {!Protocol.DOM.RGBA} color
+   */
+  colorPicked(color) {
+  }
+
+  /**
+   * @override
+   */
+  interstitialShown() {
+  }
+
+  /**
+   * @override
+   */
+  interstitialHidden() {
+  }
+
+  /**
+   * @override
+   */
+  navigationRequested() {
+  }
+};
+
+SDK.SDKModel.register(SDK.ScreenCaptureModel, SDK.Target.Capability.ScreenCapture);