Desktop chrome tab capture-chooseDesktopMedia()

chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc

Index: chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc
diff --git a/chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc b/chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc
index 04c3685110401a8a43a598b0e45f69ea92f522df..b88e0a8b199a256eb74fb24d764a33f9330ac9ff 100644
--- a/chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc
+++ b/chrome/browser/extensions/api/desktop_capture/desktop_capture_base.cc
@@ -29,7 +29,6 @@ namespace {
 const char kInvalidSourceNameError[] = "Invalid source type specified.";
 const char kEmptySourcesListError[] =
     "At least one source type must be specified.";
-const char kTabCaptureNotSupportedError[] = "Tab capture is not supported yet.";
 
 DesktopCaptureChooseDesktopMediaFunctionBase::PickerFactory* g_picker_factory =
     NULL;
@@ -76,6 +75,7 @@ bool DesktopCaptureChooseDesktopMediaFunctionBase::Execute(
 
   bool show_screens = false;
   bool show_windows = false;
+  bool show_tabs = false;
 
   for (auto source_type : sources) {
     switch (source_type) {
@@ -92,12 +92,12 @@ bool DesktopCaptureChooseDesktopMediaFunctionBase::Execute(
         break;
 
       case api::desktop_capture::DESKTOP_CAPTURE_SOURCE_TYPE_TAB:
-        error_ = kTabCaptureNotSupportedError;
-        return false;
+        show_tabs = true;
+        break;
     }
   }
 
-  if (!show_screens && !show_windows) {
+  if (!show_screens && !show_windows && !show_tabs) {
     error_ = kEmptySourcesListError;
     return false;
   }
@@ -111,10 +111,11 @@ bool DesktopCaptureChooseDesktopMediaFunctionBase::Execute(
     picker_ = g_picker_factory->CreatePicker();
   } else {
 #if defined(USE_ASH)
+    const int source_types = (show_screens ? DesktopMediaListAsh::SCREENS : 0) |
+                             (show_windows ? DesktopMediaListAsh::WINDOWS : 0) |
+                             (show_tabs ? DesktopMediaListAsh::TABS : 0);
     if (chrome::IsNativeWindowInAsh(parent_window)) {
-      media_list.reset(new DesktopMediaListAsh(
-          (show_screens ? DesktopMediaListAsh::SCREENS : 0) |
-          (show_windows ? DesktopMediaListAsh::WINDOWS : 0)));
+      media_list.reset(new DesktopMediaListAsh(source_types));
     }
 #endif
     if (!media_list) {
@@ -125,9 +126,8 @@ bool DesktopCaptureChooseDesktopMediaFunctionBase::Execute(
           show_screens ? webrtc::ScreenCapturer::Create(options) : NULL);
       scoped_ptr<webrtc::WindowCapturer> window_capturer(
           show_windows ? webrtc::WindowCapturer::Create(options) : NULL);
-
-      media_list.reset(new NativeDesktopMediaList(std::move(screen_capturer),
-                                                  std::move(window_capturer)));
+      media_list.reset(new NativeDesktopMediaList(
+          std::move(screen_capturer), std::move(window_capturer), show_tabs));
     }
 
     // DesktopMediaPicker is implemented only for Windows, OSX and