[iOS] Add OverlayModality::kWebContentArea classes.

This CL adds the container coordinator and coordinator factory for the
kWebContentArea modality.

Bug: 941745
Change-Id: Id539be9a3776ed80fc293578cd33394896e71117
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1610095Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664922}

ios/chrome/browser/ui/browser_container/browser_container_coordinator.h

@@ -15,6 +15,13 @@
 // web contents of the browser view.
 @interface BrowserContainerCoordinator : ChromeCoordinator
 
+// The BrowserContainerCoordinator must be constructed with a Browser, so the
+// ChromeBrowserState initializer is unavailable.
+- (instancetype)initWithBaseViewController:(UIViewController*)viewController
+                              browserState:
+                                  (ios::ChromeBrowserState*)browserState
+    NS_UNAVAILABLE;
+
 // The view controller managing the container view.
 @property(nonatomic, strong, readonly)
     BrowserContainerViewController* viewController;

ios/chrome/browser/ui/browser_view/browser_coordinator.mm

@@ -222,7 +222,7 @@
 - (void)startBrowserContainer {
   self.browserContainerCoordinator = [[BrowserContainerCoordinator alloc]
       initWithBaseViewController:nil
-                    browserState:self.browserState];
+                         browser:self.browser];
   [self.browserContainerCoordinator start];
 }
 

ios/chrome/browser/ui/overlays/BUILD.gn

@@ -28,6 +28,7 @@ source_set("overlays") {
     "//ios/chrome/browser/main",
     "//ios/chrome/browser/overlays",
     "//ios/chrome/browser/ui/coordinators:chrome_coordinators",
+    "//ios/chrome/browser/ui/overlays/web_content_area",
     "//ios/chrome/common/ui_util",
   ]
 }

ios/chrome/browser/ui/overlays/overlay_coordinator_factory.mm

@@ -7,6 +7,7 @@
 #include "base/logging.h"
 #import "ios/chrome/browser/ui/overlays/overlay_coordinator_factory+initialization.h"
 #import "ios/chrome/browser/ui/overlays/overlay_request_coordinator.h"
+#import "ios/chrome/browser/ui/overlays/web_content_area/web_content_area_supported_overlay_coordinator_classes.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ -29,8 +30,8 @@
   NSArray<Class>* supportedCoordinatorClasses = @[];
   switch (modality) {
     case OverlayModality::kWebContentArea:
-      // TODO(crbug.com/941745): Reset |supportedCoordinatorClasses| to contain
-      // OverlayRequestCoordinator classes once implemented.
+      supportedCoordinatorClasses =
+          web_content_area::GetSupportedOverlayCoordinatorClasses();
       break;
   }
   return [[self alloc] initWithBrowser:browser

ios/chrome/browser/ui/overlays/web_content_area/BUILD.gn

+# Copyright 2019 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+source_set("web_content_area") {
+  public = [
+    "web_content_area_supported_overlay_coordinator_classes.h",
+  ]
+  sources = [
+    "web_content_area_supported_overlay_coordinator_classes.mm",
+  ]
+
+  configs += [ "//build/config/compiler:enable_arc" ]
+
+  deps = [
+    "//base",
+    "//ios/chrome/browser/ui/overlays:coordinators",
+  ]
+}

ios/chrome/browser/ui/overlays/web_content_area/web_content_area_supported_overlay_coordinator_classes.h

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_UI_OVERLAYS_WEB_CONTENT_AREA_WEB_CONTENT_AREA_SUPPORTED_OVERLAY_COORDINATOR_CLASSES_H_
+#define IOS_CHROME_BROWSER_UI_OVERLAYS_WEB_CONTENT_AREA_WEB_CONTENT_AREA_SUPPORTED_OVERLAY_COORDINATOR_CLASSES_H_
+
+#import <Foundation/Foundation.h>
+
+namespace web_content_area {
+
+// Returns the supported OverlayRequestCoordinator classes for
+// OverlayModality::kWebContentArea.
+NSArray<Class>* GetSupportedOverlayCoordinatorClasses();
+
+}  // web_content_area
+
+#endif  // IOS_CHROME_BROWSER_UI_OVERLAYS_WEB_CONTENT_AREA_WEB_CONTENT_AREA_SUPPORTED_OVERLAY_COORDINATOR_CLASSES_H_

ios/chrome/browser/ui/overlays/web_content_area/web_content_area_supported_overlay_coordinator_classes.mm

+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "ios/chrome/browser/ui/overlays/web_content_area/web_content_area_supported_overlay_coordinator_classes.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace web_content_area {
+
+NSArray<Class>* GetSupportedOverlayCoordinatorClasses() {
+  // TODO(crbug.com/941745): Add more supported overlay coordinator classes.
+  return @[];
+}
+
+}  // web_content_area