Use css-device-adapt constraining for legacy viewport tags.

Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. 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
@@ skipping 353 matching lines @@
         if (renderer->style()) {
             renderer->style()->setTextAutosizingMultiplier(2);
             EXPECT_EQ(2, renderer->style()->textAutosizingMultiplier());
             multiplierSetAtLeastOnce = true;
         }
         renderer = renderer->nextInPreOrder();
     }
     EXPECT_TRUE(multiplierSetAtLeastOnce);
 
     WebCore::ViewportArguments arguments = document->viewportArguments();
-    arguments.width += 10;
+    // Choose a width that's not going match the viewport width of the loaded document.
+    arguments.minWidth = arguments.maxWidth = WebCore::Length(100, WebCore::Fixed);

[abarth-chromium, 2013/09/05 05:53:22]

Normally we would put each assignment on its own line.

[rune, 2013/09/05 07:05:52]

Done.

     webViewImpl()->updatePageDefinedPageScaleConstraints(arguments);
 
     bool multiplierCheckedAtLeastOnce = false;
     renderer = document->renderer();
     while (renderer) {
         if (renderer->style()) {
             EXPECT_EQ(1, renderer->style()->textAutosizingMultiplier());
             multiplierCheckedAtLeastOnce = true;
         }
         renderer = renderer->nextInPreOrder();
@@ skipping 3367 matching lines @@
     m_webView = FrameTestHelpers::createWebViewAndLoad(m_baseURL + "push_state.html", true, 0, &client);
     runPendingTasks();
 
     EXPECT_EQ(client.startLoadingCount(), 2);
     EXPECT_EQ(client.stopLoadingCount(), 2);
     m_webView->close();
     m_webView = 0;
 }
 
 } // namespace