Add picker view for Web Share Target.

chrome/browser/webshare/share_service_impl.cc

Index: chrome/browser/webshare/share_service_impl.cc
diff --git a/chrome/browser/webshare/share_service_impl.cc b/chrome/browser/webshare/share_service_impl.cc
index 6b12400c3c504f60efbcd012ffb45f0dcde34ba0..9e09506633daeed66bc7fd77458e3b54f5b59446 100644
--- a/chrome/browser/webshare/share_service_impl.cc
+++ b/chrome/browser/webshare/share_service_impl.cc
@@ -9,8 +9,10 @@
 #include <utility>
 
 #include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
+#include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
@@ -124,6 +126,28 @@ void ShareServiceImpl::Share(const std::string& title,
                              const std::string& text,
                              const GURL& share_url,
                              const ShareCallback& callback) {
+  // TODO(constantina): Replace hard-coded name with the registered target list.
+  constexpr wchar_t kTargetName[] = L"Web Share Target Test App";

[sky, 2017/01/23 16:38:56]

Make this const char and use Ascii to UTF16.

[Matt Giuca, 2017/01/30 04:07:13]

In the past, I've done it this way because at least on Windows, WideToUTF16 is a
no-op. So I think it makes more sense, but isn't a big deal so... Done.

+  std::vector<base::string16> targets{base::WideToUTF16(kTargetName)};
+
+  // TODO(mgiuca): Get the browser window as |parent_window|.
+  gfx::NativeWindow browser_window = nullptr;
+  chrome::ShowWebShareTargetPickerDialog(
+      browser_window, targets,
+      base::Bind(&ShareServiceImpl::OnPickerClosed, base::Unretained(this),
+                 title, text, share_url, callback));
+}
+
+void ShareServiceImpl::OnPickerClosed(const std::string& title,
+                                      const std::string& text,
+                                      const GURL& share_url,
+                                      const ShareCallback& callback,
+                                      bool picked) {
+  if (!picked) {
+    callback.Run(base::Optional<std::string>("Share was cancelled"));
+    return;
+  }
+
   // TODO(constantina): replace hard-coded URL with one from user-chosen site.
   constexpr char kUrlBase[] = "https://wicg.github.io/web-share-target/";
   constexpr char kUrlTemplate[] =