Revert 273866 "Block content scripts from executing until user g..."

trunk/src/extensions/renderer/script_injection.cc

 // Copyright 2014 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 "extensions/renderer/script_injection.h"
 
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "base/metrics/histogram.h"
 #include "content/public/common/url_constants.h"
-#include "content/public/renderer/render_view.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/extension_messages.h"
-#include "extensions/common/feature_switch.h"
 #include "extensions/common/permissions/permissions_data.h"
 #include "extensions/renderer/dom_activity_logger.h"
 #include "extensions/renderer/extension_groups.h"
-#include "extensions/renderer/extension_helper.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/user_script_slave.h"
 #include "grit/renderer_resources.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
-#include "third_party/WebKit/public/web/WebView.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "url/gurl.h"
 
 namespace extensions {
 
 namespace {
 
-// The id of the next pending injection.
-int64 g_next_pending_id = 0;
-
-// The number of an invalid request, which is used if the feature to delay
-// script injection is not enabled.
-const int64 kInvalidRequestId = -1;
-
 // These two strings are injected before and after the Greasemonkey API and
 // user script to wrap it in an anonymous scope.
 const char kUserScriptHead[] = "(function (unsafeWindow) {\n";
 const char kUserScriptTail[] = "\n})(window);";
 
 // Greasemonkey API source that is injected with the scripts.
 struct GreasemonkeyApiJsString {
   GreasemonkeyApiJsString();
   blink::WebScriptSource source;
 };
@@ skipping 10 matching lines @@
     LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 ScriptInjection::ScriptsRunInfo::ScriptsRunInfo() : num_css(0u), num_js(0u) {
 }
 
 ScriptInjection::ScriptsRunInfo::~ScriptsRunInfo() {
 }
 
-struct ScriptInjection::PendingInjection {
-  PendingInjection(blink::WebFrame* web_frame,
-                   UserScript::RunLocation run_location,
-                   int page_id);
-  ~PendingInjection();
-
-  // The globally-unique id of this request.
-  int64 id;
-
-  // The pointer to the web frame into which the script should be injected.
-  // This is weak, but safe because we remove pending requests when a frame is
-  // terminated.
-  blink::WebFrame* web_frame;
-
-  // The run location to inject at.
-  // Note: This could be a lie - we might inject well after this run location
-  // has come and gone. But we need to know it to know which scripts to inject.
-  UserScript::RunLocation run_location;
-
-  // The corresponding page id, to protect against races.
-  int page_id;
-};
-
-ScriptInjection::PendingInjection::PendingInjection(
-    blink::WebFrame* web_frame,
-    UserScript::RunLocation run_location,
-    int page_id)
-    : id(g_next_pending_id++),
-      web_frame(web_frame),
-      run_location(run_location),
-      page_id(page_id) {
-}
-
-ScriptInjection::PendingInjection::~PendingInjection() {
-}
-
 // static
 GURL ScriptInjection::GetDocumentUrlForFrame(blink::WebFrame* frame) {
   GURL data_source_url = ScriptContext::GetDataSourceURLForFrame(frame);
   if (!data_source_url.is_empty() && frame->isViewSourceModeEnabled()) {
     data_source_url = GURL(content::kViewSourceScheme + std::string(":") +
                            data_source_url.spec());
   }
 
   return data_source_url;
 }
 
 ScriptInjection::ScriptInjection(
     scoped_ptr<UserScript> script,
     UserScriptSlave* user_script_slave)
     : script_(script.Pass()),
       extension_id_(script_->extension_id()),
       user_script_slave_(user_script_slave),
       is_standalone_or_emulate_greasemonkey_(
           script_->is_standalone() || script_->emulate_greasemonkey()) {
 }
 
 ScriptInjection::~ScriptInjection() {
 }
 
-void ScriptInjection::InjectIfAllowed(blink::WebFrame* frame,
-                                      UserScript::RunLocation run_location,
-                                      const GURL& document_url,
-                                      ScriptsRunInfo* scripts_run_info) {
-  if (!WantsToRun(frame, run_location, document_url))
-    return;
-
-  const Extension* extension = user_script_slave_->GetExtension(extension_id_);
-  DCHECK(extension);  // WantsToRun() should be false if there's no extension.
-
-  // We use the top render view here (instead of the render view for the
-  // frame), because script injection on any frame requires permission for
-  // the top frame. Additionally, if we have to show any UI for permissions,
-  // it should only be done on the top frame.
-  content::RenderView* top_render_view =
-      content::RenderView::FromWebView(frame->top()->view());
-
-  int tab_id = ExtensionHelper::Get(top_render_view)->tab_id();
-
-  // By default, we allow injection.
-  bool should_inject = true;
-
-  // Check if the extension requires user consent for injection *and* we have a
-  // valid tab id (if we don't have a tab id, we have no UI surface to ask for
-  // user consent).
-  if (tab_id != -1 &&
-      PermissionsData::RequiresActionForScriptExecution(
-          extension,
-          tab_id,
-          frame->top()->document().url())) {
-    int64 request_id = kInvalidRequestId;
-    int page_id = top_render_view->GetPageId();
-
-    // We only delay the injection if the feature is enabled.
-    // Otherwise, we simply treat this as a notification by passing an invalid
-    // id.
-    if (FeatureSwitch::scripts_require_action()->IsEnabled()) {
-      should_inject = false;
-      ScopedVector<PendingInjection>::iterator pending_injection =
-          pending_injections_.insert(
-              pending_injections_.end(),
-              new PendingInjection(frame, run_location, page_id));
-      request_id = (*pending_injection)->id;
-    }
-
-    top_render_view->Send(
-        new ExtensionHostMsg_RequestContentScriptPermission(
-            top_render_view->GetRoutingID(),
-            extension->id(),
-            page_id,
-            request_id));
-  }
-
-  if (should_inject)
-    Inject(frame, run_location, scripts_run_info);
-}
-
-bool ScriptInjection::NotifyScriptPermitted(
-    int64 request_id,
-    content::RenderView* render_view,
-    ScriptsRunInfo* scripts_run_info,
-    blink::WebFrame** frame_out) {
-  ScopedVector<PendingInjection>::iterator iter = pending_injections_.begin();
-  while (iter != pending_injections_.end() && (*iter)->id != request_id)
-    ++iter;
-
-  // No matching request.
-  if (iter == pending_injections_.end())
-    return false;
-
-  // We found the request, so pull it out of the pending list.
-  scoped_ptr<PendingInjection> pending_injection(*iter);
-  pending_injections_.weak_erase(iter);
-
-  // Ensure the Page ID and Extension are still valid. Otherwise, don't inject.
-  if (render_view->GetPageId() != pending_injection->page_id)
-    return false;
-
-  const Extension* extension = user_script_slave_->GetExtension(extension_id_);
-  if (!extension)
-    return false;
-
-  // Everything matches! Inject the script.
-  if (frame_out)
-    *frame_out = pending_injection->web_frame;
-  Inject(pending_injection->web_frame,
-         pending_injection->run_location,
-         scripts_run_info);
-  return true;
-}
-
-void ScriptInjection::FrameDetached(blink::WebFrame* frame) {
-  // Any pending injections associated with the given frame will never run.
-  // Remove them.
-  for (ScopedVector<PendingInjection>::iterator iter =
-           pending_injections_.begin();
-       iter != pending_injections_.end();) {
-    if ((*iter)->web_frame == frame)
-      pending_injections_.erase(iter);
-    else
-      ++iter;
-  }
-}
-
 bool ScriptInjection::WantsToRun(blink::WebFrame* frame,
                                  UserScript::RunLocation run_location,
                                  const GURL& document_url) const {
   if (frame->parent() && !script_->match_all_frames())
     return false;  // Only match subframes if the script declared it wanted to.
 
   const Extension* extension = user_script_slave_->GetExtension(extension_id_);
   // Since extension info is sent separately from user script info, they can
   // be out of sync. We just ignore this situation.
   if (!extension)
@@ skipping 99 matching lines @@
   scripts_run_info->num_css += css_scripts.size();
   for (UserScript::FileList::const_iterator iter = css_scripts.begin();
        iter != css_scripts.end();
        ++iter) {
     frame->document().insertStyleSheet(
         blink::WebString::fromUTF8(iter->GetContent().as_string()));
   }
 }
 
 }  // namespace extensions