Revert "Interstitial call ShowContextMenu on Android"

This reverts commit a17de6fe.

Reason for revert: The options in the selection menu don't work. Copy and Select All don't do anything.

Original change's description:
> Interstitial call ShowContextMenu on Android
> 
> Override |ShowContextMenu()| in InterstitialPageImpl and have it call
> |WebContentsViewAndroid.ShowContextMenu()| on Android. This is done to
> show the floating text selection menu (see linked bug).
> 
> Bug: 823173
> Change-Id: I01090aee43536cd06c8f8bc28ebccf5c2767d0d8
> Reviewed-on: https://chromium-review.googlesource.com/977240
> Reviewed-by: Bo <boliu@chromium.org>
> Reviewed-by: Carlos IL <carlosil@chromium.org>
> Commit-Queue: Pedro Amaral <amaralp@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#546210}

TBR=boliu@chromium.org,amaralp@chromium.org,carlosil@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 823173
Change-Id: Ia0743769b372b93acda2835c2274456f3a5379a0
Reviewed-on: https://chromium-review.googlesource.com/994191Reviewed-by: Pedro Amaral <amaralp@chromium.org>
Reviewed-by: Carlos IL <carlosil@chromium.org>
Commit-Queue: Pedro Amaral <amaralp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547953}

content/browser/frame_host/interstitial_page_impl.cc

@@ -58,10 +58,6 @@
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/base/page_transition_types.h"
 
-#if defined(OS_ANDROID)
-#include "content/browser/web_contents/web_contents_view_android.h"
-#endif
-
 using blink::WebDragOperation;
 using blink::WebDragOperationsMask;
 
@@ -798,15 +794,6 @@ void InterstitialPageImpl::CreateNewFullscreenWidget(int32_t render_process_id,
       << "InterstitialPage does not support showing full screen popups.";
 }
 
-void InterstitialPageImpl::ShowContextMenu(RenderFrameHost* render_frame_host,
-                                           const ContextMenuParams& params) {
-#if defined(OS_ANDROID)
-  static_cast<WebContentsViewAndroid*>(
-      static_cast<WebContentsImpl*>(web_contents())->GetView())
-      ->ShowContextMenu(render_frame_host, params);
-#endif
-}
-
 void InterstitialPageImpl::ShowCreatedWindow(int process_id,
                                              int main_frame_widget_route_id,
                                              WindowOpenDisposition disposition,

content/browser/frame_host/interstitial_page_impl.h

@@ -107,8 +107,6 @@ class CONTENT_EXPORT InterstitialPageImpl : public InterstitialPage,
                const NotificationDetails& details) override;
 
   // RenderFrameHostDelegate implementation:
-  void ShowContextMenu(RenderFrameHost* render_frame_host,
-                       const ContextMenuParams& params) override;
   bool OnMessageReceived(RenderFrameHostImpl* render_frame_host,
                          const IPC::Message& message) override;
   void RenderFrameCreated(RenderFrameHost* render_frame_host) override;