[telemetry] Move telemetry/core/chrome/ to telemetry/core/backends/chrome/

tools/telemetry/telemetry/core/chrome/inspector_page.py

-# Copyright (c) 2012 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.
-import json
-import logging
-
-from telemetry.core import util
-
-class InspectorPage(object):
-  def __init__(self, inspector_backend):
-    self._inspector_backend = inspector_backend
-    self._inspector_backend.RegisterDomain(
-        'Page',
-        self._OnNotification,
-        self._OnClose)
-    self._navigation_pending = False
-
-  def _OnNotification(self, msg):
-    logging.debug('Notification: %s', json.dumps(msg, indent=2))
-    if msg['method'] == 'Page.frameNavigated' and self._navigation_pending:
-      url = msg['params']['frame']['url']
-      if (not url == 'chrome://newtab/' and not url == 'about:blank'
-          and not 'parentId' in msg['params']['frame']):
-        # Marks the navigation as complete and unblocks the
-        # PerformActionAndWaitForNavigate call.
-        self._navigation_pending = False
-
-  def _OnClose(self):
-    pass
-
-  def PerformActionAndWaitForNavigate(self, action_function, timeout=60):
-    """Executes action_function, and waits for the navigation to complete.
-
-    action_function is expect to result in a navigation. This function returns
-    when the navigation is complete or when the timeout has been exceeded.
-    """
-
-    # Turn on notifications. We need them to get the Page.frameNavigated event.
-    request = {
-        'method': 'Page.enable'
-        }
-    res = self._inspector_backend.SyncRequest(request, timeout)
-    assert len(res['result'].keys()) == 0
-
-    def DisablePageNotifications():
-      request = {
-          'method': 'Page.disable'
-          }
-      res = self._inspector_backend.SyncRequest(request, timeout)
-      assert len(res['result'].keys()) == 0
-
-    self._navigation_pending = True
-    try:
-      action_function()
-    except:
-      DisablePageNotifications()
-      raise
-
-    def IsNavigationDone(time_left):
-      self._inspector_backend.DispatchNotifications(time_left)
-      return not self._navigation_pending
-    util.WaitFor(IsNavigationDone, timeout, pass_time_left_to_func=True)
-
-    DisablePageNotifications()
-
-  def Navigate(self, url, script_to_evaluate_on_commit=None, timeout=60):
-    """Navigates to |url|.
-
-    If |script_to_evaluate_on_commit| is given, the script source string will be
-    evaluated when the navigation is committed. This is after the context of
-    the page exists, but before any script on the page itself has executed.
-    """
-
-    def DoNavigate():
-      if script_to_evaluate_on_commit:
-        request = {
-            'method': 'Page.addScriptToEvaluateOnLoad',
-            'params': {
-                'scriptSource': script_to_evaluate_on_commit,
-                }
-            }
-        self._inspector_backend.SyncRequest(request)
-      # Navigate the page. However, there seems to be a bug in chrome devtools
-      # protocol where the request id for this event gets held on the browser
-      # side pretty much indefinitely.
-      #
-      # So, instead of waiting for the event to actually complete, wait for the
-      # Page.frameNavigated event.
-      request = {
-          'method': 'Page.navigate',
-          'params': {
-              'url': url,
-              }
-          }
-      self._inspector_backend.SendAndIgnoreResponse(request)
-    self.PerformActionAndWaitForNavigate(DoNavigate, timeout)
-
-  def GetCookieByName(self, name, timeout=60):
-    """Returns the value of the cookie by the given |name|."""
-    request = {
-        'method': 'Page.getCookies'
-        }
-    res = self._inspector_backend.SyncRequest(request, timeout)
-    cookies = res['result']['cookies']
-    for cookie in cookies:
-      if cookie['name'] == name:
-        return cookie['value']
-    return None
-
-  def CollectGarbage(self, timeout=60):
-    request = {
-        'method': 'HeapProfiler.CollectGarbage'
-        }
-    self._inspector_backend.SyncRequest(request, timeout)