DevTools: Add sendOverProtocol() method for protocol debugging

The WebInspector.sendOverProtocol method provides an easy mechanism to test
and debug protocol commands. It's intended for developer debugging only.

Examples:

    WebInspector.sendOverProtocol('Emulation.setDeviceMetricsOverride', { ... });
    WebInspector.sendOverProtocol('Emulation.clearDeviceMetricsOverride');

    WebInspector.sendOverProtocol('Page.captureScreenshot')
        .then((err, result) => console.log(result));

Committed: https://crrev.com/2a55bf6d555cb626486ca86bc806e33a2d1a7a19
Cr-Commit-Position: refs/heads/master@{#405625}

[dgozman, 2016-07-13 22:50:02]

dgozman@chromium.org changed reviewers:
+ dgozman@chromium.org

[dgozman, 2016-07-13 22:50:03]

https://codereview.chromium.org/2149833002/diff/1/third_party/WebKit/Source/d...
File third_party/WebKit/Source/devtools/front_end/main/Connections.js (right):

https://codereview.chromium.org/2149833002/diff/1/third_party/WebKit/Source/d...
third_party/WebKit/Source/devtools/front_end/main/Connections.js:145:
WebInspector.sendOverProtocol = function(method, params, cb){
Let's move this to main.

https://codereview.chromium.org/2149833002/diff/1/third_party/WebKit/Source/d...
File third_party/WebKit/Source/devtools/front_end/sdk/InspectorBackend.js
(right):

https://codereview.chromium.org/2149833002/diff/1/third_party/WebKit/Source/d...
third_party/WebKit/Source/devtools/front_end/sdk/InspectorBackend.js:326:
sendUserMessage = function(method, params, cb){
sendRawMessageForTesting

[paulirish, 2016-07-13 23:37:50]

Description was changed from

==========
WIP: webinspector.sendoverprotocol()

BUG=
==========

to

==========

==========

[paulirish, 2016-07-14 00:43:38]

ready for review!

[dgozman, 2016-07-14 01:02:18]

lgtm. Please add description to the patch (it's empty right now).

https://codereview.chromium.org/2149833002/diff/40001/third_party/WebKit/Sour...
File third_party/WebKit/Source/devtools/front_end/sdk/InspectorBackend.js
(right):

https://codereview.chromium.org/2149833002/diff/40001/third_party/WebKit/Sour...
third_party/WebKit/Source/devtools/front_end/sdk/InspectorBackend.js:325:
sendRawMessageForTesting: function(method, params, cb)
cb -> callback

[paulirish, 2016-07-14 22:08:35]

Description was changed from

==========

==========

to

==========
The WebInspector.sendOverProtocol method provides an easy mechanism to test
and debug protocol commands. It's intended for developer debugging only.

Examples:

    WebInspector.sendOverProtocol('Emulation.setDeviceMetricsOverride', { ...
});
    WebInspector.sendOverProtocol('Emulation.clearDeviceMetricsOverride');

    WebInspector.sendOverProtocol('Page.captureScreenshot')
        .then((err, result) => console.log(result));
==========

[paulirish, 2016-07-14 22:08:53]

The CQ bit was checked by paulirish@chromium.org

[paulirish, 2016-07-14 22:08:54]

The patchset sent to the CQ was uploaded after l-g-t-m from dgozman@chromium.org
Link to the patchset: https://codereview.chromium.org/2149833002/#ps60001
(title: "callback")

[commit-bot: I haz the power, 2016-07-14 22:09:58]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-14 23:27:05]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-07-14 23:27:07]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-14 23:29:17]

Description was changed from

==========
The WebInspector.sendOverProtocol method provides an easy mechanism to test
and debug protocol commands. It's intended for developer debugging only.

Examples:

    WebInspector.sendOverProtocol('Emulation.setDeviceMetricsOverride', { ...
});
    WebInspector.sendOverProtocol('Emulation.clearDeviceMetricsOverride');

    WebInspector.sendOverProtocol('Page.captureScreenshot')
        .then((err, result) => console.log(result));
==========

to

==========
The WebInspector.sendOverProtocol method provides an easy mechanism to test
and debug protocol commands. It's intended for developer debugging only.

Examples:

    WebInspector.sendOverProtocol('Emulation.setDeviceMetricsOverride', { ...
});
    WebInspector.sendOverProtocol('Emulation.clearDeviceMetricsOverride');

    WebInspector.sendOverProtocol('Page.captureScreenshot')
        .then((err, result) => console.log(result));

Committed: https://crrev.com/2a55bf6d555cb626486ca86bc806e33a2d1a7a19
Cr-Commit-Position: refs/heads/master@{#405625}
==========

[commit-bot: I haz the power, 2016-07-14 23:29:18]

Patchset 4 (id:??) landed as
https://crrev.com/2a55bf6d555cb626486ca86bc806e33a2d1a7a19
Cr-Commit-Position: refs/heads/master@{#405625}