diff --git a/lib/StaticAnalyzer/Checkers/CStringChecker.cpp b/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
index 51e6650..1fa4d57 100644
--- a/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
@@ -12,7 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "ExperimentalChecks.h"
+#include "ClangSACheckers.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerVisitor.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/GRStateTrait.h"
@@ -109,7 +109,7 @@
 }
 }
 
-void ento::RegisterCStringChecker(ExprEngine &Eng) {
+void ento::registerCStringChecker(ExprEngine &Eng) {
   Eng.registerCheck(new CStringChecker());
 }
 
diff --git a/lib/StaticAnalyzer/Checkers/Checkers.td b/lib/StaticAnalyzer/Checkers/Checkers.td
index b8e69dd..020cef1 100644
--- a/lib/StaticAnalyzer/Checkers/Checkers.td
+++ b/lib/StaticAnalyzer/Checkers/Checkers.td
@@ -9,11 +9,32 @@
 
 include "clang/StaticAnalyzer/Checkers/CheckerBase.td"
 
+//===----------------------------------------------------------------------===//
+// Packages.
+//===----------------------------------------------------------------------===//
+
 def Core : Package<"core">;
 def Cocoa : Package<"cocoa">;
 def Unix : Package<"unix">;
 def MacOSX : Package<"macosx">;
 
+def CoreExperimental : Package<"experimental">,
+  InPackage<Core>, Hidden;
+
+def UnixExperimental : Package<"experimental">,
+  InPackage<Unix>, Hidden;
+
+//===----------------------------------------------------------------------===//
+// Groups.
+//===----------------------------------------------------------------------===//
+
+def AllExperimental : CheckerGroup<"all-experimental">,
+  Hidden;
+
+//===----------------------------------------------------------------------===//
+// Checkers.
+//===----------------------------------------------------------------------===//
+
 let ParentPackage = Cocoa in {
 
 def ObjCSelfInitChecker : Checker<"SelfInit">,
@@ -40,3 +61,36 @@
   InPackage<MacOSX>,
   HelpText<"Check calls to various MacOSXAPIChecker">,
   DescFile<"MacOSXAPIChecker.cpp">;
+
+//===----------------------------------------------------------------------===//
+// Hidden experimental checkers.
+//===----------------------------------------------------------------------===//
+
+let Group = AllExperimental in {
+
+def CStringChecker : Checker<"CString">,
+  InPackage<CoreExperimental>,
+  HelpText<"Check calls to functions in <string.h>">,
+  DescFile<"CStringChecker.cpp">;
+
+def UnreachableCodeChecker : Checker<"UnreachableCode">,
+  InPackage<CoreExperimental>,
+  HelpText<"Check unreachable code">,
+  DescFile<"UnreachableCodeChecker.cpp">;
+
+def ChrootChecker : Checker<"Chroot">,
+  InPackage<UnixExperimental>,
+  HelpText<"Check improper use of chroot">,
+  DescFile<"ChrootChecker.cpp">;
+
+def PthreadLockChecker : Checker<"PthreadLock">,
+  InPackage<UnixExperimental>,
+  HelpText<"Simple lock -> unlock checker">,
+  DescFile<"PthreadLockChecker.cpp">;
+
+def StreamChecker : Checker<"Stream">,
+  InPackage<UnixExperimental>,
+  HelpText<"Check stream handling functions">,
+  DescFile<"StreamChecker.cpp">;
+
+}
diff --git a/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp b/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
index c0c990a..a184dd4 100644
--- a/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
@@ -11,7 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "ExperimentalChecks.h"
+#include "ClangSACheckers.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerVisitor.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/GRState.h"
@@ -59,7 +59,7 @@
 
 } // end anonymous namespace
 
-void ento::RegisterChrootChecker(ExprEngine &Eng) {
+void ento::registerChrootChecker(ExprEngine &Eng) {
   Eng.registerCheck(new ChrootChecker());
 }
 
diff --git a/lib/StaticAnalyzer/Checkers/ExperimentalChecks.cpp b/lib/StaticAnalyzer/Checkers/ExperimentalChecks.cpp
index 606fb35..28a045d 100644
--- a/lib/StaticAnalyzer/Checkers/ExperimentalChecks.cpp
+++ b/lib/StaticAnalyzer/Checkers/ExperimentalChecks.cpp
@@ -22,12 +22,7 @@
 void ento::RegisterExperimentalChecks(ExprEngine &Eng) {
   // These are checks that never belong as internal checks
   // within ExprEngine.
-  RegisterCStringChecker(Eng);
-  RegisterChrootChecker(Eng);
-  RegisterMallocChecker(Eng);
-  RegisterPthreadLockChecker(Eng);
-  RegisterStreamChecker(Eng);
-  RegisterUnreachableCodeChecker(Eng);
+  RegisterMallocChecker(Eng); // ArrayBoundChecker depends on this.
 }
 
 void ento::RegisterExperimentalInternalChecks(ExprEngine &Eng) {
diff --git a/lib/StaticAnalyzer/Checkers/ExperimentalChecks.h b/lib/StaticAnalyzer/Checkers/ExperimentalChecks.h
index 739d34d..aa87705 100644
--- a/lib/StaticAnalyzer/Checkers/ExperimentalChecks.h
+++ b/lib/StaticAnalyzer/Checkers/ExperimentalChecks.h
@@ -22,13 +22,8 @@
 class ExprEngine;
 
 void RegisterAnalyzerStatsChecker(ExprEngine &Eng);
-void RegisterChrootChecker(ExprEngine &Eng);
-void RegisterCStringChecker(ExprEngine &Eng);
 void RegisterIdempotentOperationChecker(ExprEngine &Eng);
 void RegisterMallocChecker(ExprEngine &Eng);
-void RegisterPthreadLockChecker(ExprEngine &Eng);
-void RegisterStreamChecker(ExprEngine &Eng);
-void RegisterUnreachableCodeChecker(ExprEngine &Eng);
 
 } // end GR namespace
 
diff --git a/lib/StaticAnalyzer/Checkers/PthreadLockChecker.cpp b/lib/StaticAnalyzer/Checkers/PthreadLockChecker.cpp
index 1f8cd89..e20230a 100644
--- a/lib/StaticAnalyzer/Checkers/PthreadLockChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/PthreadLockChecker.cpp
@@ -12,10 +12,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "ClangSACheckers.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerVisitor.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/GRStateTrait.h"
-#include "ExperimentalChecks.h"
 #include "llvm/ADT/ImmutableSet.h"
 
 using namespace clang;
@@ -53,7 +53,7 @@
 } // end GR namespace
 } // end clang namespace
 
-void ento::RegisterPthreadLockChecker(ExprEngine &Eng) {
+void ento::registerPthreadLockChecker(ExprEngine &Eng) {
   Eng.registerCheck(new PthreadLockChecker());
 }
 
diff --git a/lib/StaticAnalyzer/Checkers/StreamChecker.cpp b/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
index ba9fed8..54792f7 100644
--- a/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
@@ -11,7 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "ExperimentalChecks.h"
+#include "ClangSACheckers.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerVisitor.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/GRState.h"
@@ -114,7 +114,7 @@
 }
 }
 
-void ento::RegisterStreamChecker(ExprEngine &Eng) {
+void ento::registerStreamChecker(ExprEngine &Eng) {
   Eng.registerCheck(new StreamChecker());
 }
 
diff --git a/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp b/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
index 1f23306..6d72e6f 100644
--- a/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/UnreachableCodeChecker.cpp
@@ -13,6 +13,7 @@
 // A similar flow-sensitive only check exists in Analysis/ReachableCode.cpp
 //===----------------------------------------------------------------------===//
 
+#include "ClangSACheckers.h"
 #include "clang/AST/ParentMap.h"
 #include "clang/Basic/Builtins.h"
 #include "clang/Basic/SourceManager.h"
@@ -21,7 +22,6 @@
 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerHelpers.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
-#include "ExperimentalChecks.h"
 #include "llvm/ADT/SmallPtrSet.h"
 
 // The number of CFGBlock pointers we want to reserve memory for. This is used
@@ -54,7 +54,7 @@
   return &x;
 }
 
-void ento::RegisterUnreachableCodeChecker(ExprEngine &Eng) {
+void ento::registerUnreachableCodeChecker(ExprEngine &Eng) {
   Eng.registerCheck(new UnreachableCodeChecker());
 }