Repurpose views+content example into a generic multiprocess views runtime

ui/views/examples/examples_with_content_main_exe.cc

+// Copyright 2014 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 "base/bind.h"
+#include "content/public/browser/browser_context.h"
+#include "ui/views/examples/examples_window_with_content.h"
+#include "ui/views_content_client/views_content_client.h"
+
+#if defined(OS_WIN)
+#include "content/public/app/startup_helper_win.h"
+#include "sandbox/win/src/sandbox_types.h"
+#endif
+
+namespace {
+
+void ShowContentExampleWindow(content::BrowserContext* browser_context,
+                              gfx::NativeView window_context) {
+  views::examples::ShowExamplesWindowWithContent(views::examples::QUIT_ON_CLOSE,
+                                                 browser_context,
+                                                 window_context);
+
+  // These lines serve no purpose other than to introduce an explicit content
+  // dependency. If the main executable doesn't have this dependency, the linker
+  // has more flexibility to reorder library dependencies in a shared component
+  // build. On linux, this can cause libc to appear before libcontent in the
+  // dlsym search path, which breaks (usually valid) assumptions made in
+  // sandbox::InitLibcUrandomOverrides(). See http://crbug.com/374712.
+  if (!browser_context) {
+    content::BrowserContext::SaveSessionState(NULL);
+    NOTREACHED();
+  }
+}
+
+}  // namespace
+
+#if defined(OS_WIN)
+int APIENTRY wWinMain(HINSTANCE instance, HINSTANCE, wchar_t*, int) {
+  sandbox::SandboxInterfaceInfo sandbox_info = {0};
+  content::InitializeSandboxInfo(&sandbox_info);
+  ui::ViewsContentClient views_content_client(instance, &sandbox_info);
+#else
+int main(int argc, const char** argv) {
+  ui::ViewsContentClient views_content_client(argc, argv);
+#endif
+
+  views_content_client.set_task(base::Bind(&ShowContentExampleWindow));
+  return views_content_client.RunMain();
+}