Add a separate call to initialize the bounds for a sky <iframe> element.

sky/engine/core/loader/FrameLoaderClient.h

Index: sky/engine/core/loader/FrameLoaderClient.h
diff --git a/sky/engine/core/loader/FrameLoaderClient.h b/sky/engine/core/loader/FrameLoaderClient.h
index ebce8059db8a786a1cb78f9b81fdf69745896bb3..1aba75551495597e03158c69e86374276dac3285 100644
--- a/sky/engine/core/loader/FrameLoaderClient.h
+++ b/sky/engine/core/loader/FrameLoaderClient.h
@@ -49,6 +49,7 @@ namespace blink {
     class FetchRequest;
     class FrameLoader;
     class FrameNetworkingContext;
+    class IntRect;
     class IntSize;
     class KURL;
     class LocalFrame;
@@ -88,7 +89,8 @@ namespace blink {
         virtual void loadURLExternally(const ResourceRequest&, NavigationPolicy, const String& suggestedName = String()) = 0;
 
         // TODO(mpcomplete): return surface ID?
-        virtual void createView(const KURL&) = 0;
+        virtual uint32_t createChildFrame(const KURL&) = 0;
+        virtual void initializeChildFrame(uint32_t, const IntRect&) = 0;

[abarth-chromium, 2014/11/07 21:25:50]

Seems like createChildFrame should return an object that has the rest of these
functions hung off it.  Otherwise we're going to spam FrameLoaderClient with a
bunch of functions that take a uint32_t as a fake |this| parameter.

[Matt Perry, 2014/11/10 23:00:56]

Done.

 
         // Transmits the change in the set of watched CSS selectors property
         // that match any element on the frame.