Gmail crash in webview

b/17324135

It is possible for the cursor backing the conversation view to
be null at various points. The webview client has now started
execising an existing method in ConversationViewFragment at times
when this cursor *is* null and exposed this bug in old code.

Change-Id: If8c2d56cb31fb5214994f94b7a86bb344ea17751
2 files changed