Move JavaScriptDialogManager, JavascriptAppModalDialogViews to components/app_modal_dialogs

chrome/browser/chrome_browser_main_mac.mm

Index: chrome/browser/chrome_browser_main_mac.mm
diff --git a/chrome/browser/chrome_browser_main_mac.mm b/chrome/browser/chrome_browser_main_mac.mm
index bfbe7eae4e377c560e70877d4d09b3c8fae05b53..1e7a0a9b4c7dd12c9d4ee27b5a8acc608885275f 100644
--- a/chrome/browser/chrome_browser_main_mac.mm
+++ b/chrome/browser/chrome_browser_main_mac.mm
@@ -22,6 +22,7 @@
 #import "chrome/browser/mac/keystone_glue.h"
 #include "chrome/browser/mac/mac_startup_profiler.h"
 #include "chrome/browser/ui/app_list/app_list_service.h"
+#include "chrome/browser/ui/app_modal_dialogs/chrome_javascript_dialog_manager_client.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/crash/app/breakpad_mac.h"
@@ -159,6 +160,7 @@ ChromeBrowserMainPartsMac::ChromeBrowserMainPartsMac(
 }
 
 ChromeBrowserMainPartsMac::~ChromeBrowserMainPartsMac() {
+  SetJavaScriptDialogManagerClient(nullptr);
 }
 
 void ChromeBrowserMainPartsMac::PreEarlyInitialization() {
@@ -268,6 +270,9 @@ void ChromeBrowserMainPartsMac::PostMainMessageLoopStart() {
 }
 
 void ChromeBrowserMainPartsMac::PreProfileInit() {
+  SetJavaScriptDialogManagerClient(
+      make_scoped_ptr(new ChromeJavaScriptDialogManagerClient));
+
   MacStartupProfiler::GetInstance()->Profile(
       MacStartupProfiler::PRE_PROFILE_INIT);
   ChromeBrowserMainPartsPosix::PreProfileInit();