Fixes a crash in the Windows media player plugin caused when the Real player ...

Fixes a crash in the Windows media player plugin caused when the Real player recorder
plugin is installed on the machine. This plugin intercepts LoadLibrary calls issued by
chrome.dll and wraps NPAPI calls provided the actual plugin dll, in this case media player.

This is to provide the Download this video functionality. 

Crash occurs probably due to an interacton with Real player and media player. Fix is to
load the plugin dynamically via the exported kernel32 function LoadLibrary instead of invoking
it via the LoadLibrary import from chrome.dll. This would bypass the recorder plugin.

Fixes bug http://code.google.com/p/chromium/issues/detail?id=63552

Bug=63552
Test=Install real player and media player on the machine and navigate to the url mentioned
     in the bug. It should not crash


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=66839

[jam, 2010-11-19 22:49:36]

lgtm to fix the crash in the short term

i don't want us to get into an arms-race with Real player on this :)  Is someone
contacting them to fix this crash going forward?

[brettw, 2010-11-22 23:54:07]

Is it necessary for this code to be added to base? It doesn't seem like
something anybody else will ever use, so is just bloating base. Can it be moved
to just living in the plugin_lib file in an ifdef?