Pull PPAPI to get the paint aggregator, hook up UI test.

chrome/test/ui/ppapi_uitest.cc

Index: chrome/test/ui/ppapi_uitest.cc
===================================================================
--- chrome/test/ui/ppapi_uitest.cc	(revision 51862)
+++ chrome/test/ui/ppapi_uitest.cc	(working copy)
@@ -118,6 +118,10 @@
   RunTestViaHTTP("URLLoader");
 }
 
+TEST_F(PPAPITest, PaintAgggregator) {
+  RunTestViaHTTP("PaintAggregator");
+}
+
 // http://crbug.com/48544
 TEST_F(PPAPITest, FAILS_Scrollbar) {
   RunTest("Scrollbar");