Hook up SetInstantPreviewHeight for ChromeOS.

chrome/browser/ui/browser_instant_controller.cc

Index: chrome/browser/ui/browser_instant_controller.cc
diff --git a/chrome/browser/ui/browser_instant_controller.cc b/chrome/browser/ui/browser_instant_controller.cc
index b4e46f5f088765b911aa5114487d2fe1a6e9726b..fcf5be67687201708b040a74ba0fd2ca25cf55a4 100644
--- a/chrome/browser/ui/browser_instant_controller.cc
+++ b/chrome/browser/ui/browser_instant_controller.cc
@@ -124,6 +124,12 @@ void BrowserInstantController::CommitInstant(TabContents* preview) {
   }
 }
 
+void BrowserInstantController::SetInstantPreviewHeight(int height,
+                                                       InstantSizeUnits units) {
+  browser_->window()->SetInstantPreviewHeight(height,
+                                              units == INSTANT_SIZE_PERCENT);
+}
+
 void BrowserInstantController::SetSuggestedText(
     const string16& text,
     InstantCompleteBehavior behavior) {