Forbid new dependencies on WebRemoteFrameImpl.

WebRemoteFrameBase is already disallowed until we devise a concrete plan
for splitting out controller functionality. As WebRemoteFrameBase is
simply a proxy class for WebRemoteFrameImpl, WebRemoteFrameImpl should
similarly be disallowed.

Bug: 712963
Change-Id: I1d883e65b958947ee36f7fa50b67dc5a5cf16ecd
Reviewed-on: https://chromium-review.googlesource.com/564072Reviewed-by: Stuart Langley <slangley@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485162}

third_party/WebKit/Source/core/DEPS

@@ -20,5 +20,6 @@ include_rules = [
     # We do not want any new dependencies on Web(Local|Remote)FrameBase.h until
     # we resolve the control layer.
     "!core/frame/WebLocalFrameBase.h",
-    "!core/frame/WebRemoteFrameBase.h"
+    "!core/frame/WebRemoteFrameBase.h",
+    "!core/frame/WebRemoteFrameImpl.h",
 ]