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

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 74e7ed4b131dd896ab1751c3234c0bc76dedbf7d..b0cfd5c3931b9abcb77fb7dea33b590e1c025742 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -482,7 +482,7 @@ void RenderWidgetHostViewAura::InitAsPopup(
   aura::Window* root = popup_parent_host_view_->window_->GetRootWindow();
   aura::client::ParentWindowWithContext(window_, root, bounds_in_screen);
 
-  SetBounds(bounds_in_screen);
+  RequestTopLevelBoundsInScreen(bounds_in_screen);
   Show();
   if (NeedsMouseCapture())
     window_->SetCapture();
@@ -596,7 +596,8 @@ void RenderWidgetHostViewAura::SetSize(const gfx::Size& size) {
   InternalSetBounds(gfx::Rect(window_->bounds().origin(), size));
 }
 
-void RenderWidgetHostViewAura::SetBounds(const gfx::Rect& rect) {
+void RenderWidgetHostViewAura::RequestTopLevelBoundsInScreen(
+    const gfx::Rect& rect) {
   display::Display display =
       popup_parent_host_view_
           ? display::Screen::GetScreen()->GetDisplayNearestWindow(