GTTF: Make automation provider recognize more IPC error conditions

1) Report IPC message deserialization errors in "delay reply" handlers.
2) Handle those errors in automation provider.

BUG=77875
Review URL: http://codereview.chromium.org/6675047

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79980 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/automation/automation_provider.cc

@@ -339,7 +339,8 @@ void AutomationProvider::OnChannelConnected(int pid) {
 
 bool AutomationProvider::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(AutomationProvider, message)
+  bool deserialize_success = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(AutomationProvider, message, deserialize_success)
 #if !defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(AutomationMsg_WindowDrag,
                                     WindowSimulateDrag)
@@ -407,8 +408,10 @@ bool AutomationProvider::OnMessageReceived(const IPC::Message& message) {
                                     OnRunUnloadHandlers)
     IPC_MESSAGE_HANDLER(AutomationMsg_SetZoomLevel, OnSetZoomLevel)
 #endif  // defined(OS_WIN)
-    IPC_MESSAGE_UNHANDLED(handled = false;OnUnhandledMessage())
-  IPC_END_MESSAGE_MAP()
+    IPC_MESSAGE_UNHANDLED(handled = false; OnUnhandledMessage())
+  IPC_END_MESSAGE_MAP_EX()
+  if (!deserialize_success)
+    OnMessageDeserializationFailure();
   return handled;
 }
 
@@ -425,6 +428,12 @@ void AutomationProvider::OnUnhandledMessage() {
   channel_->Close();
 }
 
+void AutomationProvider::OnMessageDeserializationFailure() {
+  LOG(ERROR) << "Failed to deserialize IPC message. "
+             << "Closing the automation channel.";
+  channel_->Close();
+}
+
 // This task just adds another task to the event queue.  This is useful if
 // you want to ensure that any tasks added to the event queue after this one
 // have already been processed by the time |task| is run.

chrome/browser/automation/automation_provider.h

@@ -179,6 +179,10 @@ class AutomationProvider
   // Returns NULL on failure.
   RenderViewHost* GetViewForTab(int tab_handle);
 
+  // Called on IPC message deserialization failure. Prints an error message
+  // and closes the IPC channel.
+  void OnMessageDeserializationFailure();
+
   scoped_ptr<AutomationAutocompleteEditTracker> autocomplete_edit_tracker_;
   scoped_ptr<AutomationBrowserTracker> browser_tracker_;
   scoped_ptr<InitialLoadObserver> initial_load_observer_;

chrome/browser/automation/testing_automation_provider.cc

@@ -193,7 +193,10 @@ void TestingAutomationProvider::Observe(NotificationType type,
 bool TestingAutomationProvider::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(TestingAutomationProvider, message)
+  bool deserialize_success = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(TestingAutomationProvider,
+                           message,
+                           deserialize_success)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(AutomationMsg_CloseBrowser, CloseBrowser)
     IPC_MESSAGE_HANDLER(AutomationMsg_CloseBrowserRequestAsync,
                         CloseBrowserAsync)
@@ -382,7 +385,9 @@ bool TestingAutomationProvider::OnMessageReceived(
 
     IPC_MESSAGE_UNHANDLED(
         handled = AutomationProvider::OnMessageReceived(message))
-  IPC_END_MESSAGE_MAP()
+  IPC_END_MESSAGE_MAP_EX()
+  if (!deserialize_success)
+    OnMessageDeserializationFailure();
   return handled;
 }
 

ipc/ipc_message_macros.h

@@ -730,7 +730,7 @@ LogFunctionMap g_log_function_mapping;
 
 #define IPC_MESSAGE_FORWARD_DELAY_REPLY(msg_class, obj, member_func) \
     case msg_class::ID: \
-    msg_class::DispatchDelayReply(&ipc_message__, obj, &member_func); \
+    msg_is_ok__ = msg_class::DispatchDelayReply(&ipc_message__, obj, &member_func); \
     break;
 
 #define IPC_MESSAGE_HANDLER_DELAY_REPLY(msg_class, member_func) \