Reimplement gpu message bus for invalidated bitmap gen IDs

tests/MessageBusTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMessageBus.h"
 #include "Test.h"
 
 struct TestMessage {
     int x;
     float y;
 };
 DECLARE_SKMESSAGEBUS_MESSAGE(TestMessage)
 
 DEF_TEST(MessageBus, r) {
     // Register two inboxes to receive all TestMessages.
     SkMessageBus<TestMessage>::Inbox inbox1, inbox2;
 
     // Send two messages.
     const TestMessage m1 = { 5, 4.2f };
     const TestMessage m2 = { 6, 4.3f };
     SkMessageBus<TestMessage>::Post(m1);
     SkMessageBus<TestMessage>::Post(m2);
 
     // Make sure we got two.
-    SkTDArray<TestMessage> messages;
+    SkTArray<TestMessage> messages;
     inbox1.poll(&messages);
     REPORTER_ASSERT(r, 2 == messages.count());
     REPORTER_ASSERT(r, 5 == messages[0].x);
     REPORTER_ASSERT(r, 6 == messages[1].x);
 
     // Send another; check we get just that one.
     const TestMessage m3 = { 1, 0.3f };
     SkMessageBus<TestMessage>::Post(m3);
     inbox1.poll(&messages);
     REPORTER_ASSERT(r, 1 == messages.count());
     REPORTER_ASSERT(r, 1 == messages[0].x);
 
     // Nothing was sent since the last read.
     inbox1.poll(&messages);
     REPORTER_ASSERT(r, 0 == messages.count());
 
     // Over all this time, inbox2 should have piled up 3 messages.
     inbox2.poll(&messages);
     REPORTER_ASSERT(r, 3 == messages.count());
     REPORTER_ASSERT(r, 5 == messages[0].x);
     REPORTER_ASSERT(r, 6 == messages[1].x);
     REPORTER_ASSERT(r, 1 == messages[2].x);
 }
 
 // Multithreaded tests tbd.