Turn ViewportAnchors into stack allocated objects.

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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 1790 matching lines @@
         float adjustment = newHeight - view->unscaledVisibleContentSize(ExcludeScrollbars).height();
         view->setTopControlsViewportAdjustment(adjustment);
     }
 }
 
 TopControls& WebViewImpl::topControls()
 {
     return page()->frameHost().topControls();
 }
 
+void WebViewImpl::resizeViewWhileAnchored(FrameView* view)
+{
+    // FIXME: TextAutosizer does not yet support out-of-process frames.
+    if (mainFrameImpl() && mainFrameImpl()->frame()->isLocalFrame()) {
+        // Avoids unnecessary invalidations while various bits of state in TextAutosizer are updated.
+        TextAutosizer::DeferUpdatePageInfo deferUpdatePageInfo(page());
+        performResize();
+    } else {
+        performResize();
+    }
+
+    m_fullscreenController->updateSize();
+
+    // Relayout immediately to recalculate the minimum scale limit for rotation anchoring.
+    if (view->needsLayout())
+        view->layout();
+}
+
 void WebViewImpl::resize(const WebSize& newSize)
 {
     if (m_shouldAutoResize || m_size == newSize)
         return;
 
     WebLocalFrameImpl* mainFrame = mainFrameImpl();
     if (!mainFrame)
         return;
 
     FrameView* view = mainFrame->frameView();
     if (!view)
         return;
 
     PinchViewport& pinchViewport = page()->frameHost().pinchViewport();
 
     bool isRotation = settings()->mainFrameResizesAreOrientationChanges()
         && m_size.width && contentsSize().width() && newSize.width != m_size.width && !m_fullscreenController->isFullscreen();
     m_size = newSize;
 
     FloatSize viewportAnchorCoords(viewportAnchorCoordX, viewportAnchorCoordY);
-    OwnPtr<ViewportAnchor> viewportAnchor = isRotation
-        ? adoptPtr<ViewportAnchor>(new RotationViewportAnchor(*view, pinchViewport, viewportAnchorCoords, m_pageScaleConstraintsSet))
-        : adoptPtr<ViewportAnchor>(new ResizeViewportAnchor(*view, pinchViewport));
-
-    viewportAnchor->setAnchor();
-
-    // FIXME: TextAutosizer does not yet support out-of-process frames.
-    if (mainFrameImpl() && mainFrameImpl()->frame()->isLocalFrame())
-    {
-        // Avoids unnecessary invalidations while various bits of state in TextAutosizer are updated.
-        TextAutosizer::DeferUpdatePageInfo deferUpdatePageInfo(page());
-        performResize();
+    if (isRotation) {
+        RotationViewportAnchor anchor(*view, pinchViewport, viewportAnchorCoords, m_pageScaleConstraintsSet);
+        resizeViewWhileAnchored(view);
     } else {
-        performResize();
+        ResizeViewportAnchor anchor(*view, pinchViewport);
+        resizeViewWhileAnchored(view);
     }
-
-    m_fullscreenController->updateSize();
-
-    // Relayout immediately to recalculate the minimum scale limit for rotation anchoring.
-    if (view->needsLayout())
-        view->layout();
-
-    viewportAnchor->restoreToAnchor();
-
     sendResizeEventAndRepaint();
 }
 
 void WebViewImpl::willEndLiveResize()
 {
     if (mainFrameImpl() && mainFrameImpl()->frameView())
         mainFrameImpl()->frameView()->willEndLiveResize();
 
     LocalFrame* frame = mainFrameImpl()->frame();
     WebPluginContainerImpl* pluginContainer = WebLocalFrameImpl::pluginContainerFromFrame(frame);
@@ skipping 2635 matching lines @@
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 void WebViewImpl::forceNextWebGLContextCreationToFail()
 {
     WebGLRenderingContext::forceNextWebGLContextCreationToFail();
 }
 
 } // namespace blink