Implemented stub ShareService mojo service, for navigator.share.

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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 "content/browser/frame_host/render_frame_host_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 35 matching lines @@
 #include "content/browser/renderer_host/input/timeout_monitor.h"
 #include "content/browser/renderer_host/media/media_devices_dispatcher_host.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_delegate.h"
 #include "content/browser/renderer_host/render_view_host_delegate_view.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/shared_worker/shared_worker_service_impl.h"
+#include "content/browser/webshare/share_service_impl.h"
 #include "content/browser/websockets/websocket_manager.h"
 #include "content/browser/webui/web_ui_controller_factory_registry.h"
 #include "content/common/accessibility_messages.h"
 #include "content/common/associated_interface_provider_impl.h"
 #include "content/common/associated_interfaces.mojom.h"
 #include "content/common/frame_messages.h"
 #include "content/common/frame_owner_properties.h"
 #include "content/common/input_messages.h"
 #include "content/common/inter_process_time_ticks_converter.h"
 #include "content/common/navigation_params.h"
@@ skipping 2247 matching lines @@
   }
 #endif
 
 #if BUILDFLAG(ENABLE_MEDIA_REMOTING)
   GetInterfaceRegistry()->AddInterface(base::Bind(
       &RemoterFactoryImpl::Bind, GetProcess()->GetID(), GetRoutingID()));
 #endif  // BUILDFLAG(ENABLE_MEDIA_REMOTING)
 
   GetContentClient()->browser()->RegisterRenderFrameMojoInterfaces(
       GetInterfaceRegistry(), this);
+
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableExperimentalWebPlatformFeatures)) {

[Matt Giuca, 2016/12/05 02:21:13]

You shouldn't check for this switch directly; you can check directly for the
WebShare feature flag (which, in turn, is controlled by
kEnableExperimentalWebPlatformFeatures).

I think you should be able to use RuntimeEnabledFeatures::webShareEnabled() by
including blink/platform/RuntimeEnabledFeatures.h (see
https://cs.chromium.org/chromium/src/out/Debug/gen/blink/platform/RuntimeEnab...).
Try this and see if it works.

I think we shouldn't leave this bare, because we don't want a compromised
renderer to be able to access this untested feature.

+    GetInterfaceRegistry()->AddInterface(base::Bind(
+        &ShareServiceImpl::Create));
+  }
 }
 
 void RenderFrameHostImpl::ResetWaitingState() {
   DCHECK(is_active());
 
   // Whenever we reset the RFH state, we should not be waiting for beforeunload
   // or close acks.  We clear them here to be safe, since they can cause
   // navigations to be ignored in OnDidCommitProvisionalLoad.
   if (is_waiting_for_beforeunload_ack_) {
     is_waiting_for_beforeunload_ack_ = false;
@@ skipping 998 matching lines @@
   // There is no pending NavigationEntry in these cases, so pass 0 as the
   // pending_nav_entry_id. If the previous handle was a prematurely aborted
   // navigation loaded via LoadDataWithBaseURL, propagate the entry id.
   return NavigationHandleImpl::Create(
       params.url, frame_tree_node_, is_renderer_initiated,
       params.was_within_same_page, params.is_srcdoc, base::TimeTicks::Now(),
       entry_id_for_data_nav, false);  // started_from_context_menu
 }
 
 }  // namespace content