Revert "Unbreak build with clang."

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 6c6cefe0d0e5d6cb8d6a0b2aeed5d066c6d707b3..4c50125fc0cd22521483b3b0b923a8bff06120e4 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -9005,7 +9005,8 @@ class Name: public HeapObject {
   STATIC_ASSERT(IS_POWER_OF_TWO(kMaxCachedArrayIndexLength + 1));
 
   static const unsigned int kContainsCachedArrayIndexMask =
-      (~kMaxCachedArrayIndexLength << ArrayIndexLengthBits::kShift) |
+      (~static_cast<unsigned>(kMaxCachedArrayIndexLength)
+       << ArrayIndexLengthBits::kShift) |
       kIsNotArrayIndexMask;
 
   // Value of empty hash field indicating that the hash is not computed.
@@ -9089,7 +9090,8 @@ class String: public Name {
   STATIC_ASSERT(IS_POWER_OF_TWO(kMaxCachedArrayIndexLength + 1));
 
   static const unsigned int kContainsCachedArrayIndexMask =
-      (~kMaxCachedArrayIndexLength << ArrayIndexLengthBits::kShift) |
+      (~static_cast<unsigned>(kMaxCachedArrayIndexLength)
+       << ArrayIndexLengthBits::kShift) |
       kIsNotArrayIndexMask;
 
   // Representation of the flat content of a String.