Instant: Use only one hidden WebContents per profile.

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
index f653b4f053608edc053345012dcdfcc1d04fb786..dc3ebcead1fe3749e7a4e561e79b67ee648e6a2d 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
@@ -21,6 +21,7 @@
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/location_bar_controller.h"
 #include "chrome/browser/extensions/tab_helper.h"
+#include "chrome/browser/instant/instant_controller.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
@@ -174,11 +175,6 @@ string16 LocationBarViewMac::GetInputString() const {
   return location_input_;
 }
 
-void LocationBarViewMac::SetInstantSuggestion(
-    const InstantSuggestion& suggestion) {
-  omnibox_view_->model()->SetInstantSuggestion(suggestion);
-}
-
 WindowOpenDisposition LocationBarViewMac::GetWindowOpenDisposition() const {
   return disposition_;
 }
@@ -300,10 +296,8 @@ void LocationBarViewMac::OnChanged() {
   ev_bubble_decoration_->SetImage(image);
   Layout();
 
-  if (browser_->instant_controller()) {
-    browser_->instant_controller()->SetOmniboxBounds(
-        gfx::Rect(NSRectToCGRect([field_ frame])));
-  }
+  if (GetInstant())
+    GetInstant()->SetOmniboxBounds(gfx::Rect(NSRectToCGRect([field_ frame])));
 }
 
 void LocationBarViewMac::OnSelectionBoundsChanged() {