Don't overflow EmbeddedContentView frame rect.

This extends to the other EmbeddedContentView subclasses the same fix
as was made to LocalFrameView in:

https://chromium-review.googlesource.com/1055675

BUG=855950
R=skobes@chromium.org

Change-Id: I4c9f29fc1e04213ff22e5debd9630ebb81eb1812
Reviewed-on: https://chromium-review.googlesource.com/1114071
Commit-Queue: Stefan Zager <szager@chromium.org>
Reviewed-by: Steve Kobes <skobes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570180}

third_party/blink/renderer/core/exported/web_plugin_container_impl.cc

@@ -153,8 +153,10 @@ IntRect WebPluginContainerImpl::FrameRect() const {
   if (owner) {
     LayoutView* owner_layout_view = owner->View();
     DCHECK(owner_layout_view);
-    if (owner_layout_view->HasOverflowClip())
-      location.Move(-owner_layout_view->ScrolledContentOffset());
+    if (owner_layout_view->HasOverflowClip()) {
+      IntSize scroll_offset(owner_layout_view->ScrolledContentOffset());
+      location.SaturatedMove(-scroll_offset.Width(), -scroll_offset.Height());
+    }
   }
 
   return IntRect(location, frame_rect_.Size());

third_party/blink/renderer/core/frame/remote_frame_view.cc

@@ -206,8 +206,10 @@ IntRect RemoteFrameView::FrameRect() const {
   if (owner) {
     LayoutView* owner_layout_view = owner->View();
     DCHECK(owner_layout_view);
-    if (owner_layout_view->HasOverflowClip())
-      location.Move(-owner_layout_view->ScrolledContentOffset());
+    if (owner_layout_view->HasOverflowClip()) {
+      IntSize scroll_offset(owner_layout_view->ScrolledContentOffset());
+      location.SaturatedMove(-scroll_offset.Width(), -scroll_offset.Height());
+    }
   }
 
   return IntRect(location, frame_rect_.Size());