Remove RWHV::SetBounds() from the public API, and make comments clearer.

chrome/browser/ui/web_contents_sizer.mm

Index: chrome/browser/ui/web_contents_sizer.mm
diff --git a/chrome/browser/ui/web_contents_sizer.mm b/chrome/browser/ui/web_contents_sizer.mm
index bdb78960da21d6fdfbe00ae6d7abc452dcfbcb92..fe5af86340e9b47f64f692c8fc3d234320b13a72 100644
--- a/chrome/browser/ui/web_contents_sizer.mm
+++ b/chrome/browser/ui/web_contents_sizer.mm
@@ -10,6 +10,11 @@
 
 void ResizeWebContents(content::WebContents* web_contents,
                        const gfx::Rect& new_bounds) {
+  // TODO(miu): This direct manipulation of the NSView needs to be removed.
+  // Currently, this is requried because some callers of ResizeWebContents() do
+  // so just after a new WebContents is created, but before the
+  // RenderWidgetHostView for the main frame has not been created yet.
+  // http://crbug.com/693953
   NSView* view = web_contents->GetNativeView();
   NSRect old_wcv_frame = [view frame];
   CGFloat new_x = old_wcv_frame.origin.x;