Handle large rects better.

base/numerics/saturated_arithmetic.h

Index: base/numerics/saturated_arithmetic.h
diff --git a/base/numerics/saturated_arithmetic.h b/base/numerics/saturated_arithmetic.h
index 7e24fe3617b127fe6641574271f55d3dbafd5f06..012832b014b1d47e61c2a5134307ee05fde13c82 100644
--- a/base/numerics/saturated_arithmetic.h
+++ b/base/numerics/saturated_arithmetic.h
@@ -56,6 +56,14 @@ ALWAYS_INLINE int32_t SaturatedNegative(int32_t a) {
   return -a;
 }
 
+ALWAYS_INLINE int32_t SaturatedAbsolute(int32_t a) {
+  if (a >= 0)
+    return a;
+  if (UNLIKELY(a == std::numeric_limits<int>::min()))
+    return std::numeric_limits<int>::max();
+  return -a;
+}
+
 ALWAYS_INLINE int GetMaxSaturatedSetResultForTesting(int fractional_shift) {
   // For C version the set function maxes out to max int, this differs from
   // the ARM asm version, see saturated_arithmetic_arm.h for the equivalent asm