Determine the element location and click synchronously on the renderer.

chrome/browser/automation/automation_provider_observers.cc

Index: chrome/browser/automation/automation_provider_observers.cc
diff --git a/chrome/browser/automation/automation_provider_observers.cc b/chrome/browser/automation/automation_provider_observers.cc
index 26a5d2d33e198ce428673def235419509eaa5291..ba68e020f8e33986f3e36faa777d0c197d4f6f7a 100644
--- a/chrome/browser/automation/automation_provider_observers.cc
+++ b/chrome/browser/automation/automation_provider_observers.cc
@@ -65,6 +65,7 @@
 #include "chrome/browser/ui/webui/ntp/most_visited_handler.h"
 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
 #include "chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.h"
+#include "chrome/common/automation_constants.h"
 #include "chrome/common/automation_messages.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_view_type.h"
@@ -1883,6 +1884,65 @@ void PageSnapshotTaker::SendMessage(bool success,
   delete this;
 }
 
+MouseEventProcessedObserver::MouseEventProcessedObserver(
+    AutomationProvider* automation,
+    IPC::Message* reply_message,
+    TabContentsWrapper* tab_contents)
+    : automation_(automation->AsWeakPtr()),
+      reply_message_(reply_message),
+      has_point_(false) {
+  registrar_.Add(this, chrome::NOTIFICATION_APP_MODAL_DIALOG_SHOWN,
+                 content::NotificationService::AllSources());
+  StartObserving(tab_contents->automation_tab_helper());
+}
+
+MouseEventProcessedObserver::~MouseEventProcessedObserver() {}
+
+void MouseEventProcessedObserver::OnWillProcessMouseEventAt(
+    const gfx::Point& point) {
+  has_point_ = true;
+  point_ = point;
+}
+
+void MouseEventProcessedObserver::OnProcessMouseEventACK(
+    bool success,
+    const std::string& error_msg) {
+  if (success && !has_point_) {
+    SendMessage(false,
+                automation::Error("Received mouse event ACK without a point"));
+  } else {
+    SendMessage(success, automation::Error(error_msg));
+  }
+}
+
+void MouseEventProcessedObserver::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  if (has_point_)
+    SendMessage(true, automation::Error());

[dennis_jeffrey, 2012/05/08 19:18:49]

To make sure I understand correctly: if OnWillProcessMouseEventAt is invoked
(and we haven't yet gotten the mouse event ACK), but then a modal dialog is
shown, we want to return success in this case?

[kkania, 2012/05/09 18:19:59]

Yes

+  else
+    SendMessage(false, automation::Error(automation::kBlockedByModalDialog));
+}
+
+void MouseEventProcessedObserver::SendMessage(
+    bool success,
+    const automation::Error& error) {
+  if (automation_) {
+    if (success) {
+      DictionaryValue dict;
+      dict.SetInteger("x", point_.x());
+      dict.SetInteger("y", point_.y());
+      AutomationJSONReply(automation_, reply_message_.release())
+          .SendSuccess(&dict);
+    } else {
+      AutomationJSONReply(automation_, reply_message_.release())
+          .SendError(error);
+    }
+  }
+  delete this;
+}
+
 namespace {
 
 // Returns a vector of dictionaries containing information about installed apps,