(blink) Propagate scrolling/marginwidth/marginheight property values to child frame.

public/web/WebFrame.h

Index: public/web/WebFrame.h
diff --git a/public/web/WebFrame.h b/public/web/WebFrame.h
index ee3a1b42d12eff522d8215da2f6f4b6c8d6d71c3..7e2fec2b521d38103d92e5a60f6b1d8e0f291fa3 100644
--- a/public/web/WebFrame.h
+++ b/public/web/WebFrame.h
@@ -80,6 +80,7 @@ struct WebConsoleMessage;
 struct WebFindOptions;
 struct WebFloatPoint;
 struct WebFloatRect;
+struct WebFrameOwnerProperties;
 struct WebPoint;
 struct WebPrintParams;
 struct WebRect;
@@ -173,6 +174,12 @@ public:
     // navigation.
     BLINK_EXPORT void setFrameOwnerSandboxFlags(WebSandboxFlags);
 
+    // Updates the scrolling and margin properties in the frame's FrameOwner.
+    // This is used when this frame's parent is in another process and it
+    // dynamically updates these properties.  The flags won't take effect until
+    // the next navigation.
+    BLINK_EXPORT void setFrameOwnerProperties(const WebFrameOwnerProperties&);

[dcheng, 2015/09/15 21:52:47]

Like sandbox, these are properties of the frame element, right? Would it make
sense to consolidate sandbox flags here too?

[lazyboy, 2015/09/15 23:50:30]

yes.
Would it make
I started with that approach and dropped it for some reason. I agree these
should be packaged /w sandbox flags, Alex?

[alexmos, 2015/09/16 00:36:47]

I've been thinking about this too.  It'd be great to package them all together,
but there are also a couple of differences that worry me.  One is that sandbox
flags are replicated for remote frames as well (see comment on
https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/r...
for the reason), whereas these things don't matter for remote frames and aren't
sent to them.  Also, there's the whole sandbox-flags-take-effect-on-navigation
bit (which causes us to delay sandbox flags update IPCs for proxies), which
doesn't seem like it applies here.  And sandbox flags get copied into the
frame's SecurityContext when taking effect (this matters when inheriting sandbox
flags), so they are a bit more than frame owner properties.

+
     // Geometry -----------------------------------------------------------
 
     // NOTE: These routines do not force page layout so their results may