keyboard: Simplify initialization and use in ash_shell.

After this change, executables that want to use the keyboard need to:
 * add 'keyboard' and 'keyboard_resources' as dependencies. Repacking
   keyboard_resources.pak is no longer necessary.
 * call keyboard::InitializeKeyboard() during startup. This installs
   the necessary pak file, and sets up a WebUIControllerFactory to
   make sure the keyboard gets the correct WebUIController.
 * create a KeyboardControllerProxy and a KeyboardController.

BUG=none

Review URL: https://codereview.chromium.org/14241037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@195835 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 28 insertions, 4 deletions

diff --git a/ui/keyboard/keyboard_controller_proxy.h b/ui/keyboard/keyboard_controller_proxy.h
index a656e06..985f573 100644
--- a/ui/keyboard/keyboard_controller_proxy.h
+++ b/ui/keyboard/keyboard_controller_proxy.h
@@ -5,12 +5,19 @@
 #ifndef UI_KEYBOARD_KEYBOARD_CONTROLLER_PROXY_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_PROXY_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "ui/keyboard/keyboard_export.h"
 
 namespace aura {
 class Window;
 }
 
+namespace content {
+class BrowserContext;
+class SiteInstance;
+class WebContents;
+}
+
 namespace ui {
 class InputMethod;
 }
@@ -21,15 +28,32 @@ namespace keyboard {
 // keyboard window.
 class KEYBOARD_EXPORT KeyboardControllerProxy {
  public:
-  virtual ~KeyboardControllerProxy() {}
+  KeyboardControllerProxy();
+  virtual ~KeyboardControllerProxy();
 
-  // Get the virtual keyboard window.  Ownership of the returned Window remains
+  // Gets the virtual keyboard window.  Ownership of the returned Window remains
   // with the proxy.
-  virtual aura::Window* GetKeyboardWindow() = 0;
+  virtual aura::Window* GetKeyboardWindow();
 
-  // Get the InputMethod that will provide notifications about changes in the
+  // Gets the InputMethod that will provide notifications about changes in the
   // text input context.
   virtual ui::InputMethod* GetInputMethod() = 0;
+
+ protected:
+  // Gets the BrowserContext to use for creating the WebContents hosting the
+  // keyboard.
+  virtual content::BrowserContext* GetBrowserContext() = 0;
+
+  // The implementation can choose to setup the WebContents before the virtual
+  // keyboard page is loaded (e.g. install a WebContentsObserver).
+  // SetupWebContents() is called right after creating the WebContents, before
+  // loading the keyboard page.
+  virtual void SetupWebContents(content::WebContents* contents);
+
+ private:
+  scoped_ptr<content::WebContents> keyboard_contents_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyboardControllerProxy);
 };
 
 }  // namespace keyboard