[Storage] Cache storage inspection on all the frames!

LayoutTests/http/tests/inspector/inspector-test.js

Index: LayoutTests/http/tests/inspector/inspector-test.js
diff --git a/LayoutTests/http/tests/inspector/inspector-test.js b/LayoutTests/http/tests/inspector/inspector-test.js
index 353c0460ebe5af536200f2225636ad8dab0b982f..72d4ad411d15b13a5dcf38edcd75045462e7fbfc 100644
--- a/LayoutTests/http/tests/inspector/inspector-test.js
+++ b/LayoutTests/http/tests/inspector/inspector-test.js
@@ -429,6 +429,33 @@ InspectorTest.addSniffer = function(receiver, methodName, override, opt_sticky)
     };
 }
 
+InspectorTest.addSnifferPromise = function(receiver, methodName)
+{
+    return new Promise(function (resolve, reject) {
+            var original = receiver[methodName];

[pfeldman, 2015/04/10 12:35:33]

poor indent.

[dmurph, 2015/04/13 18:23:03]

Removed.

+            if (typeof original !== "function") {
+                reject("Cannot find method to override: " + methodName);
+                return;
+            }
+
+            receiver[methodName] = function(var_args) {
+                try {
+                    var result = original.apply(this, arguments);
+                } finally {
+                    receiver[methodName] = original;
+                }
+                // In case of exception the override won't be called.
+                try {
+                    Array.prototype.push.call(arguments, result);
+                    resolve.apply(this, arguments);
+                } catch (e) {
+                    reject("Exception in overriden method '" + methodName + "': " + e);
+                }
+                return result;
+            };
+        });
+}
+
 InspectorTest.addConsoleSniffer = function(override, opt_sticky)
 {
     InspectorTest.addSniffer(WebInspector.ConsoleModel.prototype, "addMessage", override, opt_sticky);