Add type inference for assignments to properties.

pkg/front_end/testcases/inference/infer_assign_to_property_full.dart.direct.expect

Index: pkg/front_end/testcases/inference/infer_assign_to_property_full.dart.direct.expect
diff --git a/pkg/front_end/testcases/inference/infer_assign_to_property_full.dart.direct.expect b/pkg/front_end/testcases/inference/infer_assign_to_property_full.dart.direct.expect
new file mode 100644
index 0000000000000000000000000000000000000000..4c07da486506325e4930e4d2d12598362ae82593
--- /dev/null
+++ b/pkg/front_end/testcases/inference/infer_assign_to_property_full.dart.direct.expect
@@ -0,0 +1,52 @@
+library test;
+import self as self;
+import "dart:core" as core;
+
+class A extends core::Object {
+  constructor •() → void
+    : super core::Object::•()
+    ;
+}
+class B extends self::A {
+  constructor •() → void
+    : super self::A::•()
+    ;
+  operator +(self::C v) → self::A
+    return null;
+  operator -(core::int i) → self::B
+    return null;
+  operator *(self::B v) → self::B
+    return null;
+  operator &(self::A v) → self::C
+    return null;
+}
+class C extends self::B {
+  constructor •() → void
+    : super self::B::•()
+    ;
+}
+class Test extends core::Object {
+  field self::B member = null;
+  constructor •() → void
+    : super core::Object::•()
+    ;
+  static method test(self::Test t) → void {
+    t.member = self::f();
+    let final dynamic #t1 = t in #t1.member.==(null) ? #t1.member = self::f() : null;
+    let final dynamic #t2 = t in #t2.member = #t2.member.+(self::f());
+    let final dynamic #t3 = t in #t3.member = #t3.member.*(self::f());
+    let final dynamic #t4 = t in #t4.member = #t4.member.&(self::f());
+    let final dynamic #t5 = t in #t5.member = #t5.member.-(1);
+    let final dynamic #t6 = t in #t6.member = #t6.member.-(1);
+    dynamic v1 = t.member = self::f();
+    dynamic v2 = let final dynamic #t7 = t in let final dynamic #t8 = #t7.member in #t8.==(null) ? #t7.member = self::f() : #t8;
+    dynamic v3 = let final dynamic #t9 = t in #t9.member = #t9.member.+(self::f());
+    dynamic v4 = let final dynamic #t10 = t in #t10.member = #t10.member.*(self::f());
+    dynamic v5 = let final dynamic #t11 = t in #t11.member = #t11.member.&(self::f());
+    dynamic v6 = let final dynamic #t12 = t in #t12.member = #t12.member.-(1);
+    dynamic v7 = let final dynamic #t13 = t in let final dynamic #t14 = #t13.member in let final dynamic #t15 = #t13.member = #t14.-(1) in #t14;
+  }
+}
+static method f() → dynamic
+  return null;
+static method main() → dynamic {}