Convert some NetError[Tab]Helper messages to mojom

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 66dc1aa7c51f4957706bddf473b94ca3ff65a3d1..867d3325d6a8d3a7dbad2b144349abf0432b71f7 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -306,11 +306,6 @@ IPC_MESSAGE_CONTROL0(ChromeViewHostMsg_ShowBrowserAccountManagementUI)
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_NetErrorInfo,
                     int /* DNS probe status */)
 
-// Tells the renderer whether or not there is a local diagnostics service that
-// can be run via ChromeViewHostMsg_RunNetworkDiagnostics messages.
-IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetCanShowNetworkDiagnosticsDialog,
-                    bool /* can_show_network_diagnostics_dialog */)
-
 #if defined(OS_ANDROID)
 // Tells the renderer whether or not offline pages exist. This is used to
 // decide if offline related button will be provided on certain error page.
@@ -327,9 +322,6 @@ IPC_MESSAGE_ROUTED5(ChromeViewMsg_SetNavigationCorrectionInfo,
                     std::string /* API key to use */,
                     GURL /* Google Search URL to use */)
 
-IPC_MESSAGE_ROUTED1(ChromeViewHostMsg_RunNetworkDiagnostics,
-                    GURL /* failed_url */)
-
 #if defined(OS_ANDROID)
 // Message sent from the renderer to the browser to show the UI for offline
 // pages.