Perform HasFastProperties check on prototypes when computing call targets in Crankshaft.

test/mjsunit/regress/regress-crbug-125148.js

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-// Flags: --allow-natives-syntax
-
-function a() {
-  this.x = 1;
-}
-var aa = new a();
-%DebugPrint(aa);
-
-function b() {
-  this.z = 23;
-  this.x = 2;
-}
-var bb = new b();
-%DebugPrint(bb);
-
-function f(o) {
-  return o.x;
+var A = {
+  foo: function() { assertUnreachable(); }
 }
 
-assertSame(1, f(aa));
-assertSame(1, f(aa));
-assertSame(2, f(bb));
-assertSame(2, f(bb));
-%OptimizeFunctionOnNextCall(f);
-assertSame(1, f(aa));
-assertSame(2, f(bb));
+var B = {
+  b: 2,
+  foo: function() { return 1; }
+}
+B.__proto__ = A;
+
+var C = {};
+C.__proto__ = B;
+
+function bar(x) {
+  return x.foo();
+}
+
+for (var i = 0; i < 3; i++) {
+  assertEquals(1, bar(C));
+}
+%OptimizeObjectForAddingMultipleProperties(B, 100);  // Force dictionary mode.
+%OptimizeFunctionOnNextCall(bar);
+assertEquals(1, bar(C));