Polymorphic inlining for some recognized methods in the optimizing compiler.

runtime/vm/intrinsifier.h

Index: runtime/vm/intrinsifier.h
===================================================================
--- runtime/vm/intrinsifier.h	(revision 25997)
+++ runtime/vm/intrinsifier.h	(working copy)
@@ -31,11 +31,9 @@
   V(_Double, _mulFromInteger, Double_mulFromInteger, 550294258)                \
   V(_Double, .fromInteger, Double_fromInteger, 881555713)                      \
   V(_ObjectArray, ., ObjectArray_Allocate, 1149848530)                         \
-  V(_ObjectArray, get:length, Array_getLength, 405297088)                      \
   V(_ObjectArray, [], Array_getIndexed, 1573881683)                            \
   V(_ObjectArray, []=, Array_setIndexed, 1644545484)                           \
   V(_GrowableObjectArray, .withData, GrowableArray_Allocate, 569069682)        \
-  V(_GrowableObjectArray, get:length, GrowableArray_getLength, 725548050)      \
   V(_GrowableObjectArray, get:_capacity, GrowableArray_getCapacity, 725548050) \
   V(_GrowableObjectArray, [], GrowableArray_getIndexed, 1889032295)            \
   V(_GrowableObjectArray, []=, GrowableArray_setIndexed, 934874427)            \
@@ -43,11 +41,9 @@
   V(_GrowableObjectArray, _setData, GrowableArray_setData, 588108129)          \
   V(_GrowableObjectArray, add, GrowableArray_add, 112207566)                   \
   V(_ImmutableArray, [], ImmutableArray_getIndexed, 1456194617)                \
-  V(_ImmutableArray, get:length, ImmutableArray_getLength, 433698233)          \
   V(Object, ==, Object_equal, 2126867222)                                      \
   V(_StringBase, get:hashCode, String_getHashCode, 320803993)                  \
   V(_StringBase, get:isEmpty, String_getIsEmpty, 110631520)                    \
-  V(_StringBase, get:length, String_getLength, 320803993)                      \
   V(_StringBase, codeUnitAt, String_codeUnitAt, 1574843871)                    \
   V(_OneByteString, get:hashCode, OneByteString_getHashCode, 682660413)        \
   V(_OneByteString, _substringUncheckedNative,                                 \
@@ -102,7 +98,6 @@
 
 
 #define TYPED_DATA_LIB_INTRINSIC_LIST(V)                                       \
-  V(_TypedList, get:length, TypedData_getLength, 1004567191)                   \
   V(_Int8Array, _new, TypedData_Int8Array_new, 1708300323)                     \
   V(_Uint8Array, _new, TypedData_Uint8Array_new, 280387497)                    \
   V(_Uint8ClampedArray, _new, TypedData_Uint8ClampedArray_new, 1035267417)     \