Rename Experimental Framework classes and concepts

third_party/WebKit/Source/core/experiments/Experiments.cpp

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "core/experiments/Experiments.h"
-
-#include "core/dom/ElementTraversal.h"
-#include "core/dom/ExceptionCode.h"
-#include "core/html/HTMLHeadElement.h"
-#include "core/html/HTMLMetaElement.h"
-#include "platform/RuntimeEnabledFeatures.h"
-#include "platform/weborigin/SecurityOrigin.h"
-#include "public/platform/Platform.h"
-#include "public/platform/WebApiKeyValidator.h"
-
-namespace blink {
-
-namespace {
-
-const char kExperimentsMetaName[] = "api-experiments";
-
-String getCurrentOrigin(ExecutionContext* executionContext)
-{
-    return executionContext->securityOrigin()->toString();
-}
-
-String getDisabledMessage(const String& apiName)
-{
-    // TODO(chasej): Update message with URL to experiments site, when live
-    return "The '" + apiName + "' API is currently enabled in limited experiments. Please see [Chrome experiments website URL] for information on enabling this experiment on your site.";
-}
-
-bool hasValidAPIKey(ExecutionContext* executionContext, const String& apiName, String* errorMessage, WebApiKeyValidator* validator)
-{
-    bool foundAnyKey = false;
-    String origin = getCurrentOrigin(executionContext);
-
-    // When in a document, the API key is provided in a meta tag
-    if (executionContext->isDocument()) {
-        HTMLHeadElement* head = toDocument(executionContext)->head();
-        for (HTMLMetaElement* metaElement = head ? Traversal<HTMLMetaElement>::firstChild(*head) : 0; metaElement; metaElement = Traversal<HTMLMetaElement>::nextSibling(*metaElement)) {
-            if (equalIgnoringCase(metaElement->name(), kExperimentsMetaName)) {
-                foundAnyKey = true;
-                String keyString = metaElement->content();
-                // Check with the validator service to verify the signature.
-                if (validator->validateApiKey(keyString, origin, apiName)) {
-                    return true;
-                }
-            }
-        }
-    }
-
-    if (errorMessage) {
-        if (foundAnyKey) {
-            *errorMessage = "The provided key(s) are not valid for the '" + apiName + "' API.";
-        } else {
-            *errorMessage = getDisabledMessage(apiName);
-        }
-    }
-    return false;
-}
-
-} // namespace
-
-// static
-bool Experiments::isApiEnabled(ExecutionContext* executionContext, const String& apiName, String* errorMessage, WebApiKeyValidator* validator)
-{
-    if (!RuntimeEnabledFeatures::experimentalFrameworkEnabled()) {
-        if (errorMessage) {
-            *errorMessage = "Experimental Framework is not enabled.";
-        }
-        return false;
-    }
-
-    if (!executionContext) {
-        ASSERT_NOT_REACHED();
-        return false;
-    }
-
-    // Experiments are only enabled for secure origins
-    bool isSecure = errorMessage
-        ? executionContext->isSecureContext(*errorMessage)
-        : executionContext->isSecureContext();
-    if (!isSecure) {
-        return false;
-    }
-
-    if (!validator) {
-        validator = Platform::current()->apiKeyValidator();
-        if (!validator) {
-            if (errorMessage) {
-                *errorMessage = "Experimental Framework is not enabled.";
-            }
-            return false;
-        }
-    }
-
-    return hasValidAPIKey(executionContext, apiName, errorMessage, validator);
-}
-
-// static
-DOMException* Experiments::createApiDisabledException(const String& apiName)
-{
-    return DOMException::create(NotSupportedError, getDisabledMessage(apiName));
-}
-
-} // namespace blink