Enable resize and layout for frames with RemoteFrame ancestors

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index ec01217dbf366abedbba8663cff2d3220623c8fa..0287f32cf713845c29477fc0a5304c4bc2e843d5 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -1589,12 +1589,26 @@ void WebViewImpl::resizePinchViewport(const WebSize& newSize)
     page()->frameHost().pinchViewport().setSize(newSize);
 }
 
+WebLocalFrameImpl* WebViewImpl::localFrameRoot()
+{
+    // FIXME: This is a temporary method that finds the first localFrame in a traversal.
+    // This is equivalent to mainFrame() if the mainFrame is in-process. We need to create
+    // separate WebWidgets to be created by RenderWidgets, which are associated with *all*
+    // local frame roots, not just the first one in the tree. Until then, this limits us
+    // to having only one functioning connected LocalFrame subtree per process.
+    for (WebCore::Frame* frame = page()->mainFrame(); frame; frame = frame->tree().traverseNext()) {
+        if (frame->isLocalRoot())
+            return WebLocalFrameImpl::fromFrame(toLocalFrame(frame));
+    }
+    return 0;
+}
+
 void WebViewImpl::resize(const WebSize& newSize)
 {
     if (m_shouldAutoResize || m_size == newSize)
         return;
 
-    FrameView* view = mainFrameImpl()->frameView();
+    FrameView* view = localFrameRoot()->frameView();
     if (!view)
         return;
 
@@ -1614,18 +1628,21 @@ void WebViewImpl::resize(const WebSize& newSize)
     }
 
     {
-        // Avoids unnecessary invalidations while various bits of state in FastTextAutosizer are updated.
-        FastTextAutosizer::DeferUpdatePageInfo deferUpdatePageInfo(page());
+        // FIXME: FastTextAutosizer does not yet support out-of-process frames.
+        if (!mainFrameImpl()->frame()->isLocalFrame()) {
+            // Avoids unnecessary invalidations while various bits of state in FastTextAutosizer are updated.
+            FastTextAutosizer::DeferUpdatePageInfo deferUpdatePageInfo(page());
+        }
 
         m_pageScaleConstraintsSet.didChangeViewSize(m_size);
 
-        updatePageDefinedViewportConstraints(mainFrameImpl()->frame()->document()->viewportDescription());
+        updatePageDefinedViewportConstraints(localFrameRoot()->frame()->document()->viewportDescription());
         updateMainFrameLayoutSize();
 
         // If the virtual viewport pinch mode is enabled, the main frame will be resized
         // after layout so it can be sized to the contentsSize.
-        if (!pinchVirtualViewportEnabled() && mainFrameImpl()->frameView())
-            mainFrameImpl()->frameView()->resize(m_size);
+        if (!pinchVirtualViewportEnabled() && localFrameRoot()->frameView())
+            localFrameRoot()->frameView()->resize(m_size);
 
         if (pinchVirtualViewportEnabled())
             page()->frameHost().pinchViewport().setSize(m_size);
@@ -1636,7 +1653,7 @@ void WebViewImpl::resize(const WebSize& newSize)
         // and thus will not be invalidated in |FrameView::performPreLayoutTasks|.
         // Therefore we should force explicit media queries invalidation here.
         if (page()->inspectorController().deviceEmulationEnabled()) {
-            if (Document* document = mainFrameImpl()->frame()->document())
+            if (Document* document = localFrameRoot()->frame()->document())
                 document->mediaQueryAffectingValueChanged();
         }
     }
@@ -1735,7 +1752,7 @@ void WebViewImpl::animate(double monotonicFrameBeginTime)
 void WebViewImpl::layout()
 {
     TRACE_EVENT0("blink", "WebViewImpl::layout");
-    PageWidgetDelegate::layout(m_page.get());
+    PageWidgetDelegate::layout(m_page.get(), localFrameRoot()->frame());
     updateLayerTreeBackgroundColor();
 
     for (size_t i = 0; i < m_linkHighlights.size(); ++i)