Fix override-from for DidChangeScreenOrientation()

Move this declaration from the "overrides RenderFrameHostDelegate"
section to the "overrides RenderWidgetHostDelegate" section to match
the actual inheritance. Should be a no-op.

Change-Id: Id0a7b70b8000b0b393cb89aae062afa74a6a17a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2067566Reviewed-by: Lan Wei <lanwei@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Klaus Weidner <klausw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743424}

content/browser/web_contents/web_contents_impl.h

@@ -692,7 +692,6 @@ class CONTENT_EXPORT WebContentsImpl : public WebContents,
   void OnPageScaleFactorChanged(RenderFrameHostImpl* source,
                                 float page_scale_factor) override;
   bool HasSeenRecentScreenOrientationChange() override;
-  void DidChangeScreenOrientation() override;
 
   // RenderViewHostDelegate ----------------------------------------------------
   RenderViewHostDelegateView* GetDelegateView() override;
@@ -876,6 +875,7 @@ class CONTENT_EXPORT WebContentsImpl : public WebContents,
   bool IsWidgetForMainFrame(RenderWidgetHostImpl* render_widget_host) override;
   bool AddDomainInfoToRapporSample(rappor::Sample* sample) override;
   bool IsShowingContextMenuOnPage() const override;
+  void DidChangeScreenOrientation() override;
 
   // RenderFrameHostManager::Delegate ------------------------------------------