Add default shadow to keyboard window

BUG=370412
TEST=
1. open virtual keyboard in google.com
2. virtual keyboard window should have the default shadow

Review URL: https://codereview.chromium.org/280273002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269915 0039d316-1c4b-4281-b951-d872f2087c98

ui/keyboard/keyboard_controller_proxy.cc

@@ -18,6 +18,7 @@
 #include "ui/keyboard/keyboard_constants.h"
 #include "ui/keyboard/keyboard_switches.h"
 #include "ui/keyboard/keyboard_util.h"
+#include "ui/wm/core/shadow.h"
 
 namespace {
 
@@ -119,6 +120,7 @@ aura::Window* KeyboardControllerProxy::GetKeyboardWindow() {
     keyboard_contents_->SetDelegate(new KeyboardContentsDelegate(this));
     SetupWebContents(keyboard_contents_.get());
     LoadContents(GetVirtualKeyboardUrl());
+    keyboard_contents_->GetNativeView()->AddObserver(this);
   }
 
   return keyboard_contents_->GetNativeView();
@@ -163,4 +165,24 @@ void KeyboardControllerProxy::ReloadKeyboardIfNeeded() {
 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

ui/keyboard/keyboard_controller_proxy.h

@@ -7,6 +7,7 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "content/public/common/media_stream_request.h"
+#include "ui/aura/window_observer.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/keyboard/keyboard_export.h"
 
@@ -24,12 +25,15 @@ class Rect;
 namespace ui {
 class InputMethod;
 }
+namespace wm {
+class Shadow;
+}
 
 namespace keyboard {
 
 // A proxy used by the KeyboardController to get access to the virtual
 // keyboard window.
-class KEYBOARD_EXPORT KeyboardControllerProxy {
+class KEYBOARD_EXPORT KeyboardControllerProxy : public aura::WindowObserver {
  public:
   class TestApi {
    public:
@@ -108,6 +112,12 @@ class KEYBOARD_EXPORT KeyboardControllerProxy {
   // loading the keyboard page.
   virtual void SetupWebContents(content::WebContents* contents);
 
+  // aura::WindowObserver overrides:
+  virtual void OnWindowBoundsChanged(aura::Window* window,
+                                     const gfx::Rect& old_bounds,
+                                     const gfx::Rect& new_bounds) OVERRIDE;
+  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
+
  private:
   friend class TestApi;
 
@@ -120,6 +130,7 @@ class KEYBOARD_EXPORT KeyboardControllerProxy {
   const GURL default_url_;
 
   scoped_ptr<content::WebContents> keyboard_contents_;
+  scoped_ptr<wm::Shadow> shadow_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardControllerProxy);
 };