Merge V8 at 2.5.9.19

Pull in the latest V8 for various stability fixes.

Note that this deviates from the Chromium 9.0.597.x branch.

Bug: 3483676
Change-Id: I06d94f1d178d76395fe437a9ac01a4c71f0fada9
diff --git a/test/mjsunit/regress/regress-1146.js b/test/mjsunit/regress/regress-1146.js
new file mode 100644
index 0000000..e8028ce
--- /dev/null
+++ b/test/mjsunit/regress/regress-1146.js
@@ -0,0 +1,48 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test keyed calls with different key types.
+function F() {}
+var a = new F();
+function f(i) { return a[i](); }
+
+a.first = function() { return 11; }
+a[0] = function() { return 22; }
+var obj = {};
+a[obj] = function() { return 33; }
+
+// Make object slow-case.
+a.foo = 0;
+delete a.foo;
+// Do multiple calls for IC transitions.
+var b = "first";
+f(b);
+f(b);
+
+assertEquals(11, f(b));
+assertEquals(22, f(0));
+assertEquals(33, f(obj));