Hook up SetInstantPreviewHeight for ChromeOS.

chrome/browser/ui/views/frame/contents_container.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/views/frame/contents_container.h"
 
 #include "base/logging.h"
 #include "ui/views/controls/webview/webview.h"
 
 using content::WebContents;
 
 // static
 const char ContentsContainer::kViewClassName[] =
     "browser/ui/views/frame/ContentsContainer";
 
 ContentsContainer::ContentsContainer(views::WebView* active)
     : active_(active),
       overlay_(NULL),
       preview_(NULL),
       preview_web_contents_(NULL),
-      active_top_margin_(0) {
+      active_top_margin_(0),
+      preview_height_(-1) {
   AddChildView(active_);
 }
 
 ContentsContainer::~ContentsContainer() {
 }
 
 void ContentsContainer::SetActive(views::WebView* active) {
   if (active_)
     RemoveChildView(active_);
   active_ = active;
@@ skipping 45 matching lines @@
   // haven't changed.
   InvalidateLayout();
 }
 
 gfx::Rect ContentsContainer::GetPreviewBounds() {
   gfx::Point screen_loc;
   ConvertPointToScreen(this, &screen_loc);
   return gfx::Rect(screen_loc, size());
 }
 
+void ContentsContainer::SetPreviewHeight(int value, bool is_percent) {
+  preview_height_ = is_percent ? (value * height()) / 100 : value;
+
+  Layout();
+}
+
 void ContentsContainer::Layout() {
   int content_y = active_top_margin_;
   int content_height = std::max(0, height() - content_y);
 
   if (active_)
     active_->SetBounds(0, content_y, width(), content_height);
 
   if (overlay_)
     overlay_->SetBounds(0, 0, width(), height());
 
   if (preview_)
-    preview_->SetBounds(0, 0, width(), height());
+    preview_->SetBounds(0, 0, width(),
+                        (preview_height_ < 0 || preview_height_ > height() ?
+                         height() : preview_height_));
 
   // Need to invoke views::View in case any views whose bounds didn't change
   // still need a layout.
   views::View::Layout();
 }
 
 std::string ContentsContainer::GetClassName() const {
   return kViewClassName;
 }