Convert FrameMsg_IntrinsicSizingInfoOfChildChanged to use blink RemoteFrame

This CL changes FrameMsg_IntrinsicSizingInfoOfChildChanged so that it
is implemented in the RemoteFrame interface since it is only got
through RenderFrameProxy.

It introduces intrinsic_sizing_info.mojom to have the type used in
IntrinsicSizingInfoOfChildChanged().

Bug: 1044304
Change-Id: I7bb41d53a415f4bd8a4eb87c270d23c28c83b27b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2015866
Commit-Queue: Julie Kim <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Reviewed-by: Kinuko Yasuda <[email protected]>
Reviewed-by: Dave Tapuska <[email protected]>
Cr-Commit-Position: refs/heads/master@{#736733}
diff --git a/third_party/blink/public/mojom/BUILD.gn b/third_party/blink/public/mojom/BUILD.gn
index b321244..c33e993 100644
--- a/third_party/blink/public/mojom/BUILD.gn
+++ b/third_party/blink/public/mojom/BUILD.gn
@@ -52,6 +52,7 @@
     "frame/frame.mojom",
     "frame/frame_policy.mojom",
     "frame/fullscreen.mojom",
+    "frame/intrinsic_sizing_info.mojom",
     "frame/lifecycle.mojom",
     "frame/media_player_action.mojom",
     "frame/navigation_initiator.mojom",