Remove the ASTContext parameter from the attribute-related methods of Decl.
The implementations of these methods can Use Decl::getASTContext() to get the ASTContext.

This commit touches a lot of files since call sites for these methods are everywhere.
I used pre-tokenized "carbon.h" and "cocoa.h" headers to do some timings, and there was no real time difference between before the commit and after it.

llvm-svn: 74501
diff --git a/clang/lib/Analysis/GRExprEngineInternalChecks.cpp b/clang/lib/Analysis/GRExprEngineInternalChecks.cpp
index 76d26dd..a2ce79a 100644
--- a/clang/lib/Analysis/GRExprEngineInternalChecks.cpp
+++ b/clang/lib/Analysis/GRExprEngineInternalChecks.cpp
@@ -566,7 +566,7 @@
     if (!FD)
       return false;
 
-    const NonNullAttr* Att = FD->getAttr<NonNullAttr>(BR.getContext());
+    const NonNullAttr* Att = FD->getAttr<NonNullAttr>();
     
     if (!Att)
       return false;