Move browser and url to WebContents from Tab.

tools/telemetry/telemetry/core/web_contents.py

Index: tools/telemetry/telemetry/core/web_contents.py
===================================================================
--- tools/telemetry/telemetry/core/web_contents.py	(revision 192364)
+++ tools/telemetry/telemetry/core/web_contents.py	(working copy)
@@ -24,6 +24,15 @@
     Be sure to check browser.supports_tab_control."""
     self._inspector_backend.Close()
 
+  @property
+  def browser(self):
+    """The browser in which this WebContents resides."""
+    return self._inspector_backend.browser
+
+  @property
+  def url(self):
+    return self._inspector_backend.url
+
   def WaitForDocumentReadyStateToBeComplete(self,
       timeout=DEFAULT_WEB_CONTENTS_TIMEOUT):
     self._inspector_backend.WaitForDocumentReadyStateToBeComplete(timeout)