athena: Add the concept of Activity and related managers.

athena/main/placeholder.cc

Index: athena/main/placeholder.cc
diff --git a/athena/main/placeholder.cc b/athena/main/placeholder.cc
index eb5c3f65c356f0b6126589c2b03e5b477b7f7178..52433549d7bc341bfe76b3415187bb1c7d6de2fd 100644
--- a/athena/main/placeholder.cc
+++ b/athena/main/placeholder.cc
@@ -4,9 +4,12 @@
 
 #include "athena/main/placeholder.h"
 
+#include "athena/main/web_task.h"
 #include "athena/screen/public/screen_manager.h"
+#include "athena/task/public/task_manager.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/public/browser/web_contents.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
@@ -40,3 +43,20 @@ void SetupBackgroundImage() {
   athena::ScreenManager::Get()->SetBackgroundImage(
       gfx::ImageSkia(canvas.ExtractImageRep()));
 }
+
+void CreateTestPages(content::BrowserContext* browser_context) {
+  const char* kTestURLs[] = {
+      "http://cyan.bikeshed.com",
+      "https://www.google.com",
+  };
+  for (size_t i = 0; i < arraysize(kTestURLs); ++i) {
+    content::WebContents::CreateParams params(browser_context);
+    content::WebContents* contents = content::WebContents::Create(params);
+    contents->GetController().LoadURL(GURL(kTestURLs[i]),
+                                      content::Referrer(),
+                                      content::PAGE_TRANSITION_TYPED,
+                                      std::string());
+    athena::TaskManager::Get()->AddTask(new WebTask(contents));
+    contents->Focus();
+  }
+}