Revert of Split PendingScript into PendingScript and ClassicPendingScript

third_party/WebKit/Source/core/dom/ClassicPendingScript.cpp

Index: third_party/WebKit/Source/core/dom/ClassicPendingScript.cpp
diff --git a/third_party/WebKit/Source/core/dom/ClassicPendingScript.cpp b/third_party/WebKit/Source/core/dom/ClassicPendingScript.cpp
deleted file mode 100644
index 2ff50687291613bb34d55af582d2715bc2ebe380..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/dom/ClassicPendingScript.cpp
+++ /dev/null
@@ -1,240 +0,0 @@
-// Copyright 2017 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/dom/ClassicPendingScript.h"
-
-#include "bindings/core/v8/ScriptSourceCode.h"
-#include "bindings/core/v8/ScriptState.h"
-#include "bindings/core/v8/V8Binding.h"
-#include "core/dom/Document.h"
-#include "core/dom/TaskRunnerHelper.h"
-#include "core/frame/LocalFrame.h"
-#include "core/frame/SubresourceIntegrity.h"
-#include "platform/loader/fetch/MemoryCache.h"
-
-namespace blink {
-
-ClassicPendingScript* ClassicPendingScript::Create(ScriptElementBase* element,
-                                                   ScriptResource* resource) {
-  return new ClassicPendingScript(element, resource, TextPosition());
-}
-
-ClassicPendingScript* ClassicPendingScript::Create(
-    ScriptElementBase* element,
-    const TextPosition& starting_position) {
-  return new ClassicPendingScript(element, nullptr, starting_position);
-}
-
-ClassicPendingScript* ClassicPendingScript::CreateForTesting(
-    ScriptResource* resource) {
-  return new ClassicPendingScript(nullptr, resource, TextPosition(), true);
-}
-
-ClassicPendingScript::ClassicPendingScript(
-    ScriptElementBase* element,
-    ScriptResource* resource,
-    const TextPosition& starting_position,
-    bool is_for_testing)
-    : PendingScript(element, starting_position),
-      integrity_failure_(false),
-      is_for_testing_(is_for_testing) {
-  CheckState();
-  SetResource(resource);
-  MemoryCoordinator::Instance().RegisterClient(this);
-}
-
-ClassicPendingScript::~ClassicPendingScript() {}
-
-NOINLINE void ClassicPendingScript::CheckState() const {
-  // TODO(hiroshige): Turn these CHECK()s into DCHECK() before going to beta.
-  CHECK(is_for_testing_ || GetElement());
-  CHECK(GetResource() || !streamer_);
-  CHECK(!streamer_ || streamer_->GetResource() == GetResource());
-}
-
-void ClassicPendingScript::DisposeInternal() {
-  MemoryCoordinator::Instance().UnregisterClient(this);
-  SetResource(nullptr);
-  integrity_failure_ = false;
-  if (streamer_)
-    streamer_->Cancel();
-  streamer_ = nullptr;
-}
-
-void ClassicPendingScript::StreamingFinished() {
-  CheckState();
-  DCHECK(GetResource());
-  if (Client())
-    Client()->PendingScriptFinished(this);
-}
-
-// Returns true if SRI check passed.
-static bool CheckScriptResourceIntegrity(Resource* resource,
-                                         ScriptElementBase* element) {
-  DCHECK_EQ(resource->GetType(), Resource::kScript);
-  ScriptResource* script_resource = ToScriptResource(resource);
-  String integrity_attr = element->IntegrityAttributeValue();
-
-  // It is possible to get back a script resource with integrity metadata
-  // for a request with an empty integrity attribute. In that case, the
-  // integrity check should be skipped, so this check ensures that the
-  // integrity attribute isn't empty in addition to checking if the
-  // resource has empty integrity metadata.
-  if (integrity_attr.IsEmpty() ||
-      script_resource->IntegrityMetadata().IsEmpty())
-    return true;
-
-  switch (script_resource->IntegrityDisposition()) {
-    case ResourceIntegrityDisposition::kPassed:
-      return true;
-
-    case ResourceIntegrityDisposition::kFailed:
-      // TODO(jww): This should probably also generate a console
-      // message identical to the one produced by
-      // CheckSubresourceIntegrity below. See https://crbug.com/585267.
-      return false;
-
-    case ResourceIntegrityDisposition::kNotChecked: {
-      if (!resource->ResourceBuffer())
-        return true;
-
-      bool passed = SubresourceIntegrity::CheckSubresourceIntegrity(
-          script_resource->IntegrityMetadata(), element->GetDocument(),
-          resource->ResourceBuffer()->Data(),
-          resource->ResourceBuffer()->size(), resource->Url(), *resource);
-      script_resource->SetIntegrityDisposition(
-          passed ? ResourceIntegrityDisposition::kPassed
-                 : ResourceIntegrityDisposition::kFailed);
-      return passed;
-    }
-  }
-
-  NOTREACHED();
-  return true;
-}
-
-void ClassicPendingScript::NotifyFinished(Resource* resource) {
-  // The following SRI checks need to be here because, unfortunately, fetches
-  // are not done purely according to the Fetch spec. In particular,
-  // different requests for the same resource do not have different
-  // responses; the memory cache can (and will) return the exact same
-  // Resource object.
-  //
-  // For different requests, the same Resource object will be returned and
-  // will not be associated with the particular request.  Therefore, when the
-  // body of the response comes in, there's no way to validate the integrity
-  // of the Resource object against a particular request (since there may be
-  // several pending requests all tied to the identical object, and the
-  // actual requests are not stored).
-  //
-  // In order to simulate the correct behavior, Blink explicitly does the SRI
-  // checks here, when a PendingScript tied to a particular request is
-  // finished (and in the case of a StyleSheet, at the point of execution),
-  // while having proper Fetch checks in the fetch module for use in the
-  // fetch JavaScript API. In a future world where the ResourceFetcher uses
-  // the Fetch algorithm, this should be fixed by having separate Response
-  // objects (perhaps attached to identical Resource objects) per request.
-  //
-  // See https://crbug.com/500701 for more information.
-  CheckState();
-  if (!is_for_testing_ && GetElement()) {
-    integrity_failure_ = !CheckScriptResourceIntegrity(resource, GetElement());
-  }
-
-  // If script streaming is in use, the client will be notified in
-  // streamingFinished.
-  if (streamer_)
-    streamer_->NotifyFinished(resource);
-  else if (Client())
-    Client()->PendingScriptFinished(this);
-}
-
-void ClassicPendingScript::NotifyAppendData(ScriptResource* resource) {
-  if (streamer_)
-    streamer_->NotifyAppendData(resource);
-}
-
-DEFINE_TRACE(ClassicPendingScript) {
-  visitor->Trace(streamer_);
-  ResourceOwner<ScriptResource>::Trace(visitor);
-  MemoryCoordinatorClient::Trace(visitor);
-  PendingScript::Trace(visitor);
-}
-
-ClassicScript* ClassicPendingScript::GetSource(const KURL& document_url,
-                                               bool& error_occurred) const {
-  CheckState();
-
-  error_occurred = this->ErrorOccurred();
-  if (GetResource()) {
-    DCHECK(GetResource()->IsLoaded());
-    if (streamer_ && !streamer_->StreamingSuppressed())
-      return ClassicScript::Create(ScriptSourceCode(streamer_, GetResource()));
-    return ClassicScript::Create(ScriptSourceCode(GetResource()));
-  }
-
-  return ClassicScript::Create(ScriptSourceCode(
-      GetElement()->TextContent(), document_url, StartingPosition()));
-}
-
-void ClassicPendingScript::SetStreamer(ScriptStreamer* streamer) {
-  DCHECK(!streamer_);
-  DCHECK(!IsWatchingForLoad());
-  streamer_ = streamer;
-  CheckState();
-}
-
-bool ClassicPendingScript::IsReady() const {
-  CheckState();
-  if (GetResource()) {
-    return GetResource()->IsLoaded() && (!streamer_ || streamer_->IsFinished());
-  }
-
-  return true;
-}
-
-bool ClassicPendingScript::ErrorOccurred() const {
-  CheckState();
-  if (GetResource())
-    return GetResource()->ErrorOccurred() || integrity_failure_;
-
-  return false;
-}
-
-void ClassicPendingScript::OnPurgeMemory() {
-  CheckState();
-  if (!streamer_)
-    return;
-  streamer_->Cancel();
-  streamer_ = nullptr;
-}
-
-void ClassicPendingScript::StartStreamingIfPossible(
-    Document* document,
-    ScriptStreamer::Type streamer_type) {
-  if (!document->GetFrame())
-    return;
-
-  ScriptState* script_state = ToScriptStateForMainWorld(document->GetFrame());
-  if (!script_state)
-    return;
-
-  ScriptStreamer::StartStreaming(
-      this, streamer_type, document->GetFrame()->GetSettings(), script_state,
-      TaskRunnerHelper::Get(TaskType::kNetworking, document));
-}
-
-bool ClassicPendingScript::WasCanceled() const {
-  return GetResource()->WasCanceled();
-}
-
-KURL ClassicPendingScript::Url() const {
-  return GetResource()->Url();
-}
-
-void ClassicPendingScript::RemoveFromMemoryCache() {
-  GetMemoryCache()->Remove(GetResource());
-}
-
-}  // namespace blink