Set keyboard height to 0 before show a keyboard in a different extension

ui/keyboard/keyboard_controller_proxy.cc

 // Copyright (c) 2013 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 "ui/keyboard/keyboard_controller_proxy.h"
 
 #include "base/command_line.h"
 #include "base/values.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 151 matching lines @@
   if (keyboard_contents_->GetURL() != default_url_) {
     // TODO(bshe): The height of system virtual keyboard and IME virtual
     // keyboard may different. The height needs to be restored too.
     LoadContents(default_url_);
   }
 }
 
 void KeyboardControllerProxy::ReloadKeyboardIfNeeded() {
   DCHECK(keyboard_contents_);
   if (keyboard_contents_->GetURL() != GetVirtualKeyboardUrl()) {
+    if (keyboard_contents_->GetURL().GetOrigin() !=
+        GetVirtualKeyboardUrl().GetOrigin()) {
+      // Sets keyboard window height to 0 before navigate to a keyboard in a
+      // different extension. This keeps the UX the same as Android.
+      gfx::Rect bounds = GetKeyboardWindow()->bounds();
+      bounds.set_y(bounds.y() + bounds.height());
+      bounds.set_height(0);
+      GetKeyboardWindow()->SetBounds(bounds);
+    }
     LoadContents(GetVirtualKeyboardUrl());
   }
 }
 
 void KeyboardControllerProxy::SetupWebContents(content::WebContents* contents) {
 }
 
 void KeyboardControllerProxy::OnWindowBoundsChanged(
     aura::Window* window,
     const gfx::Rect& old_bounds,
     const gfx::Rect& new_bounds) {
   if (!shadow_) {
     shadow_.reset(new wm::Shadow());
     shadow_->Init(wm::Shadow::STYLE_ACTIVE);
     shadow_->layer()->SetVisible(true);
     DCHECK(keyboard_contents_->GetNativeView()->parent());
     keyboard_contents_->GetNativeView()->parent()->layer()->Add(
         shadow_->layer());
   }
 
   shadow_->SetContentBounds(new_bounds);
 }
 
 void KeyboardControllerProxy::OnWindowDestroyed(aura::Window* window) {
   window->RemoveObserver(this);
 }
 
 }  // namespace keyboard