These commands are used for the "Edit As HTML" feature in DevTools. This
renames our existing HTML getter IPC to indicate that it is for outer
HTML. DevTools will need a separate inner HTML getter.
The "on_received_console_message" and "on_received_console_messages"
were indistinguishable in purpose based on their name. This renames them
to:
on_console_message_available - WebContent has output a console message
and it is available for the client to retrieve.
on_received_styled_console_messages - WebContent has replied to a
request for the available console messages.
The "styled" qualifier is used here to indicate that the messages have
been styled with CSS for display in a WebView. This is to prepare for
an upcoming patch where DevToolsConsoleClient will not stylize the
output; DevTools will want the raw JS values.
Our own Inspector differs from most other DevTools implementations with
regard to highlighting DOM nodes as you hover elements in the inspected
DOM tree. In other implementations, as you change the hovered node, the
browser will render a box model overlay onto the page for that node. We
currently don't do this; we wait until you click the node, at which
point we both paint the overlay and inspect the node's properties.
This patch does not change that behavior, but separates the IPCs and
internal tracking of inspected nodes to support the standard DevTools
behavior. So the DOM document now stores an inspected node and a
highlighted node. The former is used for features such as "$0" in the
JavaScript console, and the latter is used for the box model overlay.
Our Inspector continues to set these to the same node.
We currently receive serialized JSON values over IPC and forward them to
them WebView callbacks, leaving it to the implementations of those
callbacks to parse the strings as JSON objects. This patch hoists that
parsing up to WebContentClient as soon as the IPC message is received.
This is to reduce the work needed for secondary implementations of these
callbacks (i.e. our Firefox DevTools server).
