[ios] Adds a LocationBarController interface.

ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm

Index: ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm
diff --git a/ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm b/ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm
index b036348e4ffefe4dcfe9f3301991a4e4522029f3..66f3955a3c96247af6435a0b8bcb08c483e9ef27 100644
--- a/ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm
+++ b/ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm
@@ -41,6 +41,7 @@
 #import "ios/chrome/browser/ui/history/tab_history_popup_controller.h"
 #import "ios/chrome/browser/ui/image_util.h"
 #import "ios/chrome/browser/ui/keyboard/hardware_keyboard_watcher.h"
+#include "ios/chrome/browser/ui/omnibox/location_bar_controller_impl.h"
 #include "ios/chrome/browser/ui/omnibox/omnibox_view_ios.h"
 #import "ios/chrome/browser/ui/reversed_animation.h"
 #include "ios/chrome/browser/ui/rtl_geometry.h"
@@ -58,6 +59,8 @@
 #import "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #import "ios/public/provider/chrome/browser/images/branded_image_provider.h"
 #import "ios/public/provider/chrome/browser/voice/voice_search_provider.h"
+#include "ios/shared/chrome/browser/ui/omnibox/location_bar_controller.h"
+#include "ios/shared/chrome/browser/ui/omnibox/location_bar_delegate.h"
 #import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
 #import "ios/third_party/material_components_ios/src/components/ProgressView/src/MaterialProgressView.h"
 #import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
@@ -256,7 +259,7 @@ CGRect RectShiftedDownAndResizedForStatusBar(CGRect rect) {
   base::scoped_nsobject<UIImageView> _incognitoIcon;
   base::scoped_nsobject<UIView> _clippingView;
 
-  std::unique_ptr<LocationBarViewIOS> _locationBar;
+  std::unique_ptr<LocationBarController> _locationBar;
   BOOL _initialLayoutComplete;
   // If |YES|, toolbar is incognito.
   BOOL _incognito;
@@ -595,8 +598,8 @@ CGRect RectShiftedDownAndResizedForStatusBar(CGRect rect) {
   [_webToolbar setAutoresizingMask:UIViewAutoresizingFlexibleWidth |
                                    UIViewAutoresizingFlexibleBottomMargin];
   [_webToolbar setFrame:[self specificControlsArea]];
-  _locationBar.reset(
-      new LocationBarViewIOS(_omniBox, _browserState, preloader, self, self));
+  _locationBar.reset(new LocationBarControllerImpl(_omniBox, _browserState,

[sdefresne, 2017/04/04 13:58:16]

nit: use base::MakeUnique if possible

  _locationBar = base::MakeUnique<...>(...);

[rohitrao (ping after 24h), 2017/04/04 14:32:29]

Done.

+                                                   preloader, self, self));
 
   // Create the determinate progress bar (phone only).
   if (idiom == IPHONE_IDIOM) {
@@ -1975,10 +1978,6 @@ CGRect RectShiftedDownAndResizedForStatusBar(CGRect rect) {
   [_keyboardVoiceSearchButton setHidden:YES];
 }
 
-- (LocationBarViewIOS*)locationBar {
-  return _locationBar.get();
-}
-
 - (CGFloat)omniboxLeading {
   // Compute what the leading (x-origin) position for the omniboox should be
   // based on what other controls are active.