Revert "content: convert accessibility notifications to callbacks"

TBR=jam

BUG=170921

Review URL: https://codereview.chromium.org/12212188

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182433 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/accessibility/cross_platform_accessibility_browsertest.cc

@@ -33,17 +33,17 @@ class CrossPlatformAccessibilityBrowserTest : public ContentBrowserTest {
   // notification that it's been received.
   const AccessibilityNodeData& GetAccessibilityNodeDataTree(
       AccessibilityMode accessibility_mode = AccessibilityModeComplete) {
-    scoped_refptr<MessageLoopRunner> loop_runner(new MessageLoopRunner);
+    WindowedNotificationObserver tree_updated_observer(
+        NOTIFICATION_ACCESSIBILITY_LAYOUT_COMPLETE,
+        NotificationService::AllSources());
     RenderWidgetHostView* host_view =
         shell()->web_contents()->GetRenderWidgetHostView();
     RenderWidgetHostImpl* host =
         RenderWidgetHostImpl::From(host_view->GetRenderWidgetHost());
     RenderViewHostImpl* view_host = static_cast<RenderViewHostImpl*>(host);
-    view_host->SetAccessibilityLayoutCompleteCallbackForTesting(
-        loop_runner->QuitClosure());
     view_host->set_save_accessibility_tree_for_testing(true);
     view_host->SetAccessibilityMode(accessibility_mode);
-    loop_runner->Run();
+    tree_updated_observer.Wait();
     return view_host->accessibility_tree_for_testing();
   }
 

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

@@ -18,6 +18,8 @@
 #include "content/browser/accessibility/dump_accessibility_tree_helper.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/port/browser/render_widget_host_view_port.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/test/test_utils.h"
@@ -26,16 +28,14 @@
 #include "content/shell/shell.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-namespace content {
-
 namespace {
+  static const char kCommentToken = '#';
+  static const char* kMarkSkipFile = "#<skip";
+  static const char* kMarkEndOfFile = "<-- End-of-file -->";
+  static const char* kSignalDiff = "*";
+} // namespace
 
-const char kCommentToken = '#';
-const char kMarkSkipFile[] = "#<skip";
-const char kMarkEndOfFile[] = "<-- End-of-file -->";
-const char kSignalDiff[] = "*";
-
-}  // namespace
+namespace content {
 
 typedef DumpAccessibilityTreeHelper::Filter Filter;
 
@@ -166,17 +166,17 @@ void DumpAccessibilityTreeTest::RunTest(
   }
 
   // Load the page.
+  WindowedNotificationObserver tree_updated_observer(
+      NOTIFICATION_ACCESSIBILITY_LOAD_COMPLETE,
+      NotificationService::AllSources());
   string16 html_contents16;
   html_contents16 = UTF8ToUTF16(html_contents);
   GURL url = GetTestUrl("accessibility",
                         html_file.BaseName().MaybeAsASCII().c_str());
-  scoped_refptr<MessageLoopRunner> loop_runner(new MessageLoopRunner);
-  view_host->SetAccessibilityLoadCompleteCallbackForTesting(
-      loop_runner->QuitClosure());
   NavigateToURL(shell(), url);
 
   // Wait for the tree.
-  loop_runner->Run();
+  tree_updated_observer.Wait();
 
   // Perform a diff (or write the initial baseline).
   string16 actual_contents_utf16;

content/browser/renderer_host/render_view_host_impl.cc

@@ -1786,16 +1786,6 @@ void RenderViewHostImpl::UpdateFrameTree(
                                    frame_tree_));
 }
 
-void RenderViewHostImpl::SetAccessibilityLayoutCompleteCallbackForTesting(
-    const base::Closure& callback) {
-  accessibility_layout_callback_ = callback;
-}
-
-void RenderViewHostImpl::SetAccessibilityLoadCompleteCallbackForTesting(
-    const base::Closure& callback) {
-  accessibility_load_callback_ = callback;
-}
-
 void RenderViewHostImpl::UpdateWebkitPreferences(
     const webkit_glue::WebPreferences& prefs) {
   Send(new ViewMsg_UpdateWebPreferences(GetRoutingID(), prefs));
@@ -1902,11 +1892,17 @@ void RenderViewHostImpl::OnAccessibilityNotifications(
       accessibility_tree_ = param.acc_tree;
     }
 
-    if (src_type == AccessibilityNotificationLayoutComplete) {
-      accessibility_layout_callback_.Run();
-    } else if (src_type == AccessibilityNotificationLoadComplete) {
-      accessibility_load_callback_.Run();
-    }
+    NotificationType dst_type;
+    if (src_type == AccessibilityNotificationLoadComplete)
+      dst_type = NOTIFICATION_ACCESSIBILITY_LOAD_COMPLETE;
+    else if (src_type == AccessibilityNotificationLayoutComplete)
+      dst_type = NOTIFICATION_ACCESSIBILITY_LAYOUT_COMPLETE;
+    else
+      dst_type = NOTIFICATION_ACCESSIBILITY_OTHER;
+    NotificationService::current()->Notify(
+          dst_type,
+          Source<RenderViewHost>(this),
+          NotificationService::NoDetails());
   }
 
   Send(new AccessibilityMsg_Notifications_ACK(GetRoutingID()));

content/browser/renderer_host/render_view_host_impl.h

@@ -414,12 +414,6 @@ class CONTENT_EXPORT RenderViewHostImpl
                        int route_id,
                        const std::string& frame_tree);
 
-  // Set accessibility callbacks.
-  void SetAccessibilityLayoutCompleteCallbackForTesting(
-      const base::Closure& callback);
-  void SetAccessibilityLoadCompleteCallbackForTesting(
-      const base::Closure& callback);
-
   void set_save_accessibility_tree_for_testing(bool save) {
     save_accessibility_tree_for_testing_ = save;
   }
@@ -658,10 +652,6 @@ class CONTENT_EXPORT RenderViewHostImpl
   // callbacks.
   std::map<int, JavascriptResultCallback> javascript_callbacks_;
 
-  // Accessibility callbacks.
-  base::Closure accessibility_layout_callback_;
-  base::Closure accessibility_load_callback_;
-
   // True if the render view can be shut down suddenly.
   bool sudden_termination_allowed_;
 

content/public/browser/notification_types.h

@@ -250,6 +250,21 @@ enum NotificationType {
   // the RenderViewHost, and the details is a DomOperationNotificationDetails.
   NOTIFICATION_DOM_OPERATION_RESPONSE,
 
+  // Indicates that the render view host has received a "load complete"
+  // accessibility notification. The source is the RenderViewHost,
+  // the details are not used.
+  NOTIFICATION_ACCESSIBILITY_LOAD_COMPLETE,
+
+  // Indicates that the render view host has received a "layout complete"
+  // accessibility notification. The source is the RenderViewHost,
+  // the details are not used.
+  NOTIFICATION_ACCESSIBILITY_LAYOUT_COMPLETE,
+
+  // Indicates that the render view host has received an accessibility
+  // notification. other than the ones covered above.
+  // The source is the RenderViewHost, the details are not used.
+  NOTIFICATION_ACCESSIBILITY_OTHER,
+
   // Child Processes ---------------------------------------------------------
 
   // This notification is sent when a child process host has connected to a