Update double-conversion and reapply NO_LINTs.

runtime/third_party/double-conversion/src/diy-fp.h

Index: runtime/third_party/double-conversion/src/diy-fp.h
diff --git a/runtime/third_party/double-conversion/src/diy-fp.h b/runtime/third_party/double-conversion/src/diy-fp.h
index 9dcf8fbdba99fd03a20d8a93cf57907b2cfadc49..2edf34674ee25c34969406d6f4bdcfb215924730 100644
--- a/runtime/third_party/double-conversion/src/diy-fp.h
+++ b/runtime/third_party/double-conversion/src/diy-fp.h
@@ -42,7 +42,7 @@ class DiyFp {
   static const int kSignificandSize = 64;
 
   DiyFp() : f_(0), e_(0) {}
-  DiyFp(uint64_t f, int e) : f_(f), e_(e) {}
+  DiyFp(uint64_t significand, int exponent) : f_(significand), e_(exponent) {}
 
   // this = this - other.
   // The exponents of both numbers must be the same and the significand of this
@@ -76,22 +76,22 @@ class DiyFp {
 
   void Normalize() {
     ASSERT(f_ != 0);
-    uint64_t f = f_;
-    int e = e_;
+    uint64_t significand = f_;
+    int exponent = e_;
 
     // This method is mainly called for normalizing boundaries. In general
     // boundaries need to be shifted by 10 bits. We thus optimize for this case.
     const uint64_t k10MSBits = UINT64_2PART_C(0xFFC00000, 00000000);
-    while ((f & k10MSBits) == 0) {
-      f <<= 10;
-      e -= 10;
+    while ((significand & k10MSBits) == 0) {
+      significand <<= 10;
+      exponent -= 10;
     }
-    while ((f & kUint64MSB) == 0) {
-      f <<= 1;
-      e--;
+    while ((significand & kUint64MSB) == 0) {
+      significand <<= 1;
+      exponent--;
     }
-    f_ = f;
-    e_ = e;
+    f_ = significand;
+    e_ = exponent;
   }
 
   static DiyFp Normalize(const DiyFp& a) {