[Devtools] Added Enable/Disable for request blocking in network

third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js b/third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js
index 2a0ae0afd4149360d1dcff2bce1142dccdb4c1b1..daa1d5388ceaa1437f6bf2f279a4a644fe545e8e 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/NetworkManager.js
@@ -693,6 +693,7 @@ SDK.MultitargetNetworkManager = class extends Common.Object {
     this._updateBlockedURLs();
 
     this._userAgentOverride = '';
+    this._isRequestBlockingEnabled = false;
     /** @type {!Set<!Protocol.NetworkAgent>} */
     this._agents = new Set();
     /** @type {!SDK.NetworkManager.Conditions} */
@@ -852,6 +853,8 @@ SDK.MultitargetNetworkManager = class extends Common.Object {
    */
   _addBlockedURL(url) {
     this._blockedURLs.add(url);
+    if (!this._isRequestBlockingEnabled)
+      return;
     for (var agent of this._agents)
       agent.addBlockedURL(url);
   }
@@ -861,10 +864,33 @@ SDK.MultitargetNetworkManager = class extends Common.Object {
    */
   _removeBlockedURL(url) {
     this._blockedURLs.delete(url);
+    if (!this._isRequestBlockingEnabled)
+      return;
     for (var agent of this._agents)
       agent.removeBlockedURL(url);
   }
 
+  /**
+   * @param {boolean} enabled
+   */
+  setRequestBlockingEnabled(enabled) {
+    if (this._isRequestBlockingEnabled === enabled)
+      return;
+    this._isRequestBlockingEnabled = enabled;
+    if (enabled) {
+      for (var agent of this._agents)
+        this._blockedURLs.forEach(url => agent.addBlockedURL(url));
+    } else {
+      for (var agent of this._agents)
+        this._blockedURLs.forEach(url => agent.removeBlockedURL(url));
+    }
+    this.emit(new SDK.MultitargetNetworkManager.RequestBlockingEnabledChangedEvent());
+  }
+
+  isRequestBlockingEnabled() {
+    return this._isRequestBlockingEnabled;
+  }
+
   clearBrowserCache() {
     for (var agent of this._agents)
       agent.clearBrowserCache();
@@ -916,6 +942,8 @@ SDK.MultitargetNetworkManager.Events = {
   UserAgentChanged: Symbol('UserAgentChanged')
 };
 
+/** @implements {Common.Emittable} */
+SDK.MultitargetNetworkManager.RequestBlockingEnabledChangedEvent = class {};
 
 /**
  * @type {!SDK.MultitargetNetworkManager}