Added Tab.SnapshotContent and MapsGL example to telemetry

tools/telemetry/telemetry/tab.py

Index: tools/telemetry/telemetry/tab.py
diff --git a/tools/telemetry/telemetry/tab.py b/tools/telemetry/telemetry/tab.py
index d6ac82a9b70e642fa22cf259790ec48f63f4b76a..9d6530fbe25b023951cc9191d3ec9bcdd800cf0d 100644
--- a/tools/telemetry/telemetry/tab.py
+++ b/tools/telemetry/telemetry/tab.py
@@ -23,11 +23,13 @@ class Tab(object):
   def __init__(self, browser, inspector_backend):
     self._browser = browser
     self._inspector_backend = inspector_backend
-    self._page = inspector_page.InspectorPage(self._inspector_backend)
-    self._runtime = inspector_runtime.InspectorRuntime(self._inspector_backend)
-    self._console = inspector_console.InspectorConsole(self._inspector_backend)
+    self._page = inspector_page.InspectorPage(self._inspector_backend, self)
+    self._runtime = inspector_runtime.InspectorRuntime(
+        self._inspector_backend, self)
+    self._console = inspector_console.InspectorConsole(
+        self._inspector_backend, self)
     self._timeline = inspector_timeline.InspectorTimeline(
-        self._inspector_backend)
+        self._inspector_backend, self)
 
   def __del__(self):
     self.Close()