Implement chrome.brailleDisplayPrivate API

chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc

Index: chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc
diff --git a/chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc b/chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc
index 6e947eb4460f9d2fb273d14482b5e35edef27c23..33be1795598b981ad89e57ab95348c23f1d95f0b 100644
--- a/chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc
+++ b/chrome/browser/extensions/api/braille_display_private/braille_display_private_api.cc
@@ -5,19 +5,25 @@
 #include "chrome/browser/extensions/api/braille_display_private/braille_display_private_api.h"
 
 #include "base/lazy_instance.h"
+#include "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
 #include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_system.h"
 
 namespace OnKeyEvent = extensions::api::braille_display_private::OnKeyEvent;
 namespace WriteDots = extensions::api::braille_display_private::WriteDots;
 using extensions::api::braille_display_private::KeyEvent;
+using extensions::api::braille_display_private::BrailleController;
 
 namespace extensions {
 BrailleDisplayPrivateAPI::BrailleDisplayPrivateAPI(Profile* profile)
     : profile_(profile) {
+  // TODO(plundblad): Consider defering this until someone actually uses the
+  // API so that we only watch for braille displays if cvox is enabled.
+  BrailleController::GetInstance()->AddObserver(this);
 }
 
 BrailleDisplayPrivateAPI::~BrailleDisplayPrivateAPI() {
+  BrailleController::GetInstance()->RemoveObserver(this);
 }
 
 void BrailleDisplayPrivateAPI::Shutdown() {
@@ -32,17 +38,25 @@ BrailleDisplayPrivateAPI::GetFactoryInstance() {
   return &g_factory.Get();
 }
 
+void BrailleDisplayPrivateAPI::OnKeyEvent(
+    const KeyEvent& keyEvent) {
+  // TODO(plundblad): Only send the event to the active profile.
+  scoped_ptr<Event> event(new Event(
+      OnKeyEvent::kEventName, OnKeyEvent::Create(keyEvent)));
+  ExtensionSystem::Get(profile_)->event_router()->BroadcastEvent(event.Pass());
+}
+
 namespace api {
 bool BrailleDisplayPrivateGetDisplayStateFunction::Prepare() {
   return true;
 }
 
 void BrailleDisplayPrivateGetDisplayStateFunction::Work() {
-  // TODO(plundblad): implement.
+  SetResult(BrailleController::GetInstance()->GetDisplayState().release());
 }
 
 bool BrailleDisplayPrivateGetDisplayStateFunction::Respond() {
-  return false;
+  return true;
 }
 
 BrailleDisplayPrivateWriteDotsFunction::
@@ -60,7 +74,7 @@ bool BrailleDisplayPrivateWriteDotsFunction::Prepare() {
 }
 
 void BrailleDisplayPrivateWriteDotsFunction::Work() {
-  // TODO(plundblad): Implement.
+  BrailleController::GetInstance()->WriteDots(params_->cells);
 }
 
 bool BrailleDisplayPrivateWriteDotsFunction::Respond() {