Revert of Show service worker navigation preload requests in DevTools…

… Network tab (patchset #9 id:460001 of https://codereview.chromium.org/2620463002/ )

Reason for revert:
Caused layout test failures.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_tests&tests=http%2Ftests%2Finspector%2Fservice-workers%2Flazy-addeventlisteners.html

Original issue's description:
> Show service worker navigation preload requests in DevTools Network tab.
>
> Demo: https://youtu.be/I-Qe_Y-xYxE
>
> Navigation Preload requests are initiated from the browser process.
> This is different from the normal network requests which are initiated from the
> renderer process.
>
> When the DevTools show the normal requests in the Network tab, DevTool's
> Network events (requestWillBeSent, responseReceived, loadingFinished etc) are
> dispatched via InspectorInstrumentation and InspectorNetworkAgent.
>
> This CL introduces new DevTool's Network events (navigationPreloadSent,
> navigationPreloadResponseReceived, navigationPreloadFailed,
> navigationPreloadFinished) which are dispatched via InspectorInstrumentation and
> InspectorNetworkAgent from ServiceWorkerContextClient.
>
> In the normal requests case, we record the request sending timestamp when the
> renderer process will send the request in InspectorNetworkAgent::
> willSendRequestInternal(). But in the navigation preload case, we record the
> timestamp in the browser process, and send it to the service worker's renderer
> process using FetchEventPreloadHandle.
>
>
> BUG=649558
>
> Review-Url: https://codereview.chromium.org/2620463002
> Cr-Commit-Position: refs/heads/master@{#445630}
> Committed: https://chromium.googlesource.com/chromium/src/+/4c6b3b0f11b62e069d9d84ba99dbe94a45a5c622

[email protected],[email protected]
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=649558

Review-Url: https://codereview.chromium.org/2649923007
Cr-Commit-Position: refs/heads/master@{#445684}

front_end/network/NetworkDataGridNode.js

@@ -785,12 +785,6 @@ Network.NetworkRequestNode = class extends Network.NetworkNode {
         cell.request = request;
         break;
 
-      case SDK.NetworkRequest.InitiatorType.Preload:
-        cell.title = Common.UIString('Preload');
-        cell.classList.add('network-dim-cell');
-        cell.appendChild(createTextNode(Common.UIString('Preload')));
-        break;
-
       default:
         cell.title = Common.UIString('Other');
         cell.classList.add('network-dim-cell');

front_end/sdk/NetworkLog.js

@@ -145,8 +145,6 @@ SDK.NetworkLog = class extends SDK.SDKModel {
           scriptId = topFrame.scriptId;
           break;
         }
-      } else if (initiator.type === Protocol.Network.InitiatorType.Preload) {
-        type = SDK.NetworkRequest.InitiatorType.Preload;
       }
     }
 

front_end/sdk/NetworkRequest.js

@@ -1136,8 +1136,7 @@ SDK.NetworkRequest.InitiatorType = {
   Other: 'other',
   Parser: 'parser',
   Redirect: 'redirect',
-  Script: 'script',
-  Preload: 'preload'
+  Script: 'script'
 };
 
 /** @typedef {!{name: string, value: string}} */

front_end/sdk/SubTargetsManager.js

@@ -130,15 +130,8 @@ SDK.SubTargetsManager = class extends SDK.SDKModel {
    * @return {number}
    */
   _capabilitiesForType(type) {
-    if (type === 'worker') {
-      var capabilities = SDK.Target.Capability.JS | SDK.Target.Capability.Log;
-      var parentTargetInfo = this.targetInfo(this.target());
-      var mainIsServiceWorker =
-          !this.target().parentTarget() && this.target().hasTargetCapability() && !this.target().hasJSCapability();
-      if ((parentTargetInfo && parentTargetInfo.type === 'service_worker') || mainIsServiceWorker)
-        capabilities |= SDK.Target.Capability.Network;
-      return capabilities;
-    }
+    if (type === 'worker')
+      return SDK.Target.Capability.JS | SDK.Target.Capability.Log;
     if (type === 'service_worker')
       return SDK.Target.Capability.Log | SDK.Target.Capability.Network | SDK.Target.Capability.Target;
     if (type === 'iframe') {
@@ -170,7 +163,7 @@ SDK.SubTargetsManager = class extends SDK.SDKModel {
 
     // Only pause new worker if debugging SW - we are going through the pause on start checkbox.
     var mainIsServiceWorker =
-        !this.target().parentTarget() && this.target().hasTargetCapability() && !this.target().hasJSCapability();
+        !this.target().parentTarget() && this.target().hasTargetCapability() && !this.target().hasBrowserCapability();
     if (mainIsServiceWorker && waitingForDebugger)
       target.debuggerAgent().pause();
     target.runtimeAgent().runIfWaitingForDebugger();