Forward {Will/Did}StartBrowser calls to page test

tools/telemetry/telemetry/page/record_wpr.py

Index: tools/telemetry/telemetry/page/record_wpr.py
diff --git a/tools/telemetry/telemetry/page/record_wpr.py b/tools/telemetry/telemetry/page/record_wpr.py
index 9d46c9cb69093178f92c3c78b9182380524afdea..1b4e71ab5a936f936af58b4251ae981f59f770a2 100755
--- a/tools/telemetry/telemetry/page/record_wpr.py
+++ b/tools/telemetry/telemetry/page/record_wpr.py
@@ -28,6 +28,14 @@ class RecorderPageTest(page_test.PageTest):  # pylint: disable=W0223
   def CanRunForPage(self, page):
     return page.url.startswith('http')
 
+  def WillStartBrowser(self, browser):
+    if self.page_test:
+      self.page_test.WillStartBrowser(browser)
+
+  def DidStartBrowser(self, browser):
+    if self.page_test:
+      self.page_test.DidStartBrowser(browser)
+
   def WillNavigateToPage(self, page, tab):
     """Override to ensure all resources are fetched from network."""
     tab.ClearCache(force=False)