Rename DOMApplicationCache to ApplicationCache and expose it to JS

Source/devtools/front_end/externs.js

Index: Source/devtools/front_end/externs.js
diff --git a/Source/devtools/front_end/externs.js b/Source/devtools/front_end/externs.js
index adbaacc4d5427eca432a59b2bffe76e87a5a1251..c21f46f60c09ae4b87dea7eb54107aa721e8eec9 100644
--- a/Source/devtools/front_end/externs.js
+++ b/Source/devtools/front_end/externs.js
@@ -176,13 +176,6 @@ Array.prototype.select = function(field) {}
  */
 Array.prototype.peekLast = function() {}
 
-DOMApplicationCache.prototype.UNCACHED = 0;

[tkent, 2013/08/19 22:47:10]

Why are they removed? Unused now?

[do-not-use, 2013/08/20 06:09:16]

I misread and thought it was faking the existence of the ApplicationCache
constants. However, the name is DOMApplicationCache, not ApplicationCache.
Therefore, it is not equivalent and may still be needed. I will keep it as it
was since I do not know how / where it is used.

Optimally, the constants on ApplicationCache should be used instead now that
they are exposed.

[do-not-use, 2013/08/20 06:17:30]

Done.

-DOMApplicationCache.prototype.IDLE = 1;
-DOMApplicationCache.prototype.CHECKING = 2;
-DOMApplicationCache.prototype.DOWNLOADING = 3;
-DOMApplicationCache.prototype.UPDATEREADY = 4;
-DOMApplicationCache.prototype.OBSOLETE = 5;
-
 // File System API
 /**
  * @constructor