Stop running pub get at gclient sync time and fix build bugs

mojo/public/dart/third_party/crypto/lib/src/sha1.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+part of crypto;
+
+/**
+ * SHA1 hash function implementation.
+ */
+class SHA1 extends _HashBase {
+  final Uint32List _w;
+
+  // Construct a SHA1 hasher object.
+  SHA1() : _w = new Uint32List(80), super(16, 5, true) {
+    _h[0] = 0x67452301;
+    _h[1] = 0xEFCDAB89;
+    _h[2] = 0x98BADCFE;
+    _h[3] = 0x10325476;
+    _h[4] = 0xC3D2E1F0;
+  }
+
+  // Returns a new instance of this Hash.
+  SHA1 newInstance() {
+    return new SHA1();
+  }
+
+  // Compute one iteration of the SHA1 algorithm with a chunk of
+  // 16 32-bit pieces.
+  void _updateHash(Uint32List m) {
+    assert(m.length == 16);
+
+    var a = _h[0];
+    var b = _h[1];
+    var c = _h[2];
+    var d = _h[3];
+    var e = _h[4];
+
+    for (var i = 0; i < 80; i++) {
+      if (i < 16) {
+        _w[i] = m[i];
+      } else {
+        var n = _w[i - 3] ^ _w[i - 8] ^ _w[i - 14] ^ _w[i - 16];
+        _w[i] = _rotl32(n, 1);
+      }
+      var t = _add32(_add32(_rotl32(a, 5), e), _w[i]);
+      if (i < 20) {
+        t = _add32(_add32(t, (b & c) | (~b & d)), 0x5A827999);
+      } else if (i < 40) {
+        t = _add32(_add32(t, (b ^ c ^ d)), 0x6ED9EBA1);
+      } else if (i < 60) {
+        t = _add32(_add32(t, (b & c) | (b & d) | (c & d)), 0x8F1BBCDC);
+      } else {
+        t = _add32(_add32(t, b ^ c ^ d), 0xCA62C1D6);
+      }
+
+      e = d;
+      d = c;
+      c = _rotl32(b, 30);
+      b = a;
+      a = t & _MASK_32;
+    }
+
+    _h[0] = _add32(a, _h[0]);
+    _h[1] = _add32(b, _h[1]);
+    _h[2] = _add32(c, _h[2]);
+    _h[3] = _add32(d, _h[3]);
+    _h[4] = _add32(e, _h[4]);
+  }
+}