Clean up handling of autosizing state changes.

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index f76f2ad58e969019ea583c52f468551281fd1044..e040bc4b346714cc4062a947d3f2d89d516cdca8 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -370,8 +370,10 @@ void FrameView::setFrameRect(const IntRect& newRect)
         return;
 
     // Autosized font sizes depend on the width of the viewing area.
+    bool mainFrameWidthChanged = false;
     if (newRect.width() != oldRect.width()) {
         if (isMainFrame()) {
+            mainFrameWidthChanged = true;
             if (m_frame->settings()->textAutosizingEnabled()) {
                 for (LocalFrame* frame = m_frame.get(); frame; frame = frame->tree().traverseNext()) {
                     if (TextAutosizer* textAutosizer = frame->document()->textAutosizer())
@@ -385,6 +387,12 @@ void FrameView::setFrameRect(const IntRect& newRect)
 
     updateScrollableAreaSet();
 
+    if (mainFrameWidthChanged) {
+        // This needs to be after the call to ScrollView::setFrameRect, because it reads the new width.
+        if (FastTextAutosizer* textAutosizer = m_frame->document()->fastTextAutosizer())
+            textAutosizer->updatePageInfoInAllFrames();
+    }
+
     if (RenderView* renderView = this->renderView()) {
         if (renderView->usesCompositing())
             renderView->compositor()->frameViewDidChangeSize();
@@ -1746,6 +1754,11 @@ void FrameView::repaintContentRectangle(const IntRect& r)
 
 void FrameView::contentsResized()
 {
+    if (isMainFrame()) {

[pdr., 2014/03/24 01:03:18]

Is this testable?

[skobes, 2014/03/25 01:23:24]

This notifies the FTA when the layout size changes, so I think a lot of tests
would fail if it wasn't there.  Did you have a specific test in mind?

+        if (FastTextAutosizer* textAutosizer = m_frame->document()->fastTextAutosizer())
+            textAutosizer->updatePageInfoInAllFrames();
+    }
+
     ScrollView::contentsResized();
     setNeedsLayout();
 }