Move wtf/BitwiseOperations.h into base/bits.h.

base/bits_unittest.cc

Index: base/bits_unittest.cc
diff --git a/base/bits_unittest.cc b/base/bits_unittest.cc
index 4f5b6ea49e5a825e119a066692966afd3787e277..270b8ef7d3b472557c0a1840e57a6f46c3d52b5d 100644
--- a/base/bits_unittest.cc
+++ b/base/bits_unittest.cc
@@ -61,5 +61,25 @@ TEST(BitsTest, Align) {
   EXPECT_EQ(kSizeTMax / 2 + 1, Align(1, kSizeTMax / 2 + 1));
 }
 
+TEST(BitsTest, CLZWorks) {
+  EXPECT_EQ(32u, CountLeadingZeroBits32(0u));
+  EXPECT_EQ(31u, CountLeadingZeroBits32(1u));
+  EXPECT_EQ(1u, CountLeadingZeroBits32(1u << 30));
+  EXPECT_EQ(0u, CountLeadingZeroBits32(1u << 31));
+
+#if defined(ARCH_CPU_64_BITS)
+  EXPECT_EQ(64u, CountLeadingZeroBitsSizeT(0ull));
+  EXPECT_EQ(63u, CountLeadingZeroBitsSizeT(1ull));
+  EXPECT_EQ(32u, CountLeadingZeroBitsSizeT(1ull << 31));
+  EXPECT_EQ(1u, CountLeadingZeroBitsSizeT(1ull << 62));
+  EXPECT_EQ(0u, CountLeadingZeroBitsSizeT(1ull << 63));
+#else
+  EXPECT_EQ(32u, CountLeadingZeroBitsSizeT(0u));
+  EXPECT_EQ(31u, CountLeadingZeroBitsSizeT(1u));
+  EXPECT_EQ(1u, CountLeadingZeroBitsSizeT(1u << 30));
+  EXPECT_EQ(0u, CountLeadingZeroBitsSizeT(1u << 31));
+#endif
+}
+
 }  // namespace bits
 }  // namespace base