DevTools: promisify ContentProvider.requestContent and all its clients.

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/ContentProviders.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/ContentProviders.js b/third_party/WebKit/Source/devtools/front_end/sdk/ContentProviders.js
index f743434ded65b0a2e3bcab98d23cbec59023b0dd..db9eebe8510448458815e35fad5aa180159f7cfb 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/ContentProviders.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/ContentProviders.js
@@ -61,11 +61,14 @@ WebInspector.CompilerSourceMappingContentProvider.prototype = {
 
     /**
      * @override
-     * @param {function(?string)} callback
+     * @return {!Promise<?string>}
      */
-    requestContent: function(callback)
+    requestContent: function()
     {
+        var callback;

[pfeldman, 2016/01/20 19:23:51]

cache promise

[lushnikov, 2016/01/20 23:35:58]

This patch is big enough and does its job. The caching thing is not going to be
a trivial change - let's not mix things up.

+        var promise = new Promise(fulfill => callback = fulfill);
         WebInspector.multitargetNetworkManager.loadResource(this._sourceURL, contentLoaded.bind(this));
+        return promise;
 
         /**
          * @param {number} statusCode
@@ -94,7 +97,7 @@ WebInspector.CompilerSourceMappingContentProvider.prototype = {
      */
     searchInContent: function(query, caseSensitive, isRegex, callback)
     {
-        this.requestContent(contentLoaded);
+        this.requestContent().then(contentLoaded);
 
         /**
          * @param {?string} content