Merged Tether and cellular network types in System Tray.

ash/system/network/network_list.cc

Index: ash/system/network/network_list.cc
diff --git a/ash/system/network/network_list.cc b/ash/system/network/network_list.cc
index c5ff03bd42ad68efb3800cf5f8986e9afadbd953..64032c3b750b2edf99daa691b918a4025bc32e0b 100644
--- a/ash/system/network/network_list.cc
+++ b/ash/system/network/network_list.cc
@@ -219,31 +219,19 @@ class CellularHeaderRowView : public NetworkListView::SectionHeaderRowView {
   void OnToggleToggled(bool is_on) override {
     NetworkStateHandler* handler =
         NetworkHandler::Get()->network_state_handler();
-    handler->SetTechnologyEnabled(NetworkTypePattern::Cellular(), is_on,
-                                  chromeos::network_handler::ErrorCallback());
+    if (handler->IsTechnologyAvailable(NetworkTypePattern::Cellular())) {

[Ryan Hansberry, 2017/05/23 01:14:29]

Awesome :). Please add a comment explaining this branch.

[stevenjb, 2017/05/23 22:11:07]

Yes please. Specifically we should explain that when Cellular is available, we
do not support Tether here.

[lesliewatkins, 2017/05/26 23:49:32]

Done.

+      handler->SetTechnologyEnabled(NetworkTypePattern::Cellular(), is_on,
+                                    chromeos::network_handler::ErrorCallback());
+    } else {
+      handler->SetTechnologyEnabled(NetworkTypePattern::Tether(), is_on,
+                                    chromeos::network_handler::ErrorCallback());
+    }
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CellularHeaderRowView);
 };
 
-class TetherHeaderRowView : public NetworkListView::SectionHeaderRowView {
- public:
-  TetherHeaderRowView()
-      : SectionHeaderRowView(IDS_ASH_STATUS_TRAY_NETWORK_TETHER) {}
-
-  ~TetherHeaderRowView() override {}
-
-  const char* GetClassName() const override { return "TetherHeaderRowView"; }
-
- protected:
-  void OnToggleToggled(bool is_on) override {
-    // TODO (hansberry): Persist toggle to settings/preferences.
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TetherHeaderRowView);
-};
 
 class WifiHeaderRowView : public NetworkListView::SectionHeaderRowView {
  public:
@@ -326,10 +314,8 @@ NetworkListView::NetworkListView(SystemTrayItem* owner, LoginStatus login)
       no_wifi_networks_view_(nullptr),
       no_cellular_networks_view_(nullptr),
       cellular_header_view_(nullptr),
-      tether_header_view_(nullptr),
       wifi_header_view_(nullptr),
       cellular_separator_view_(nullptr),
-      tether_separator_view_(nullptr),
       wifi_separator_view_(nullptr),
       connection_warning_(nullptr) {}
 
@@ -457,12 +443,12 @@ void NetworkListView::UpdateNetworkIcons() {
         prohibited_by_policy;
     info->connected = network->IsConnectedState();
     info->connecting = network->IsConnectingState();
-    if (network->Matches(NetworkTypePattern::WiFi()))
+    if (network->Matches(NetworkTypePattern::WiFi())) {
       info->type = NetworkInfo::Type::WIFI;
-    else if (network->Matches(NetworkTypePattern::Cellular()))
+    } else if (network->Matches(NetworkTypePattern::Cellular()) ||
+               network->Matches(NetworkTypePattern::Tether())) {

[stevenjb, 2017/05/23 22:11:07]

So, we discussed possible changes to NetworkTypePattern before. Given the
current direction I think we should go ahead and create
NetworkTypePattern::Mobile to include Cellular and Tether. I think that would
make this code slightly more clear.

[Ryan Hansberry, 2017/05/27 00:16:22]

Ping.

[lesliewatkins, 2017/05/30 18:29:51]

Done.

       info->type = NetworkInfo::Type::CELLULAR;
-    else if (network->Matches(NetworkTypePattern::Tether()))
-      info->type = NetworkInfo::Type::TETHER;
+    }
     if (prohibited_by_policy) {
       info->tooltip =
           l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_NETWORK_PROHIBITED);
@@ -543,11 +529,14 @@ NetworkListView::UpdateNetworkListEntries() {
       UpdateNetworkChildren(NetworkInfo::Type::UNKNOWN, index);
   index += new_guids->size();
 
-  if (handler->IsTechnologyAvailable(NetworkTypePattern::Cellular())) {
+  if (handler->IsTechnologyAvailable(NetworkTypePattern::Cellular()) ||
+      handler->IsTechnologyAvailable(NetworkTypePattern::Tether())) {
     index = UpdateSectionHeaderRow(
         NetworkTypePattern::Cellular(),
-        handler->IsTechnologyEnabled(NetworkTypePattern::Cellular()), index,
-        &cellular_header_view_, &cellular_separator_view_);
+        handler->IsTechnologyEnabled(NetworkTypePattern::Cellular()) ||
+            (!handler->IsTechnologyAvailable(NetworkTypePattern::Cellular()) &&

[Ryan Hansberry, 2017/05/23 01:14:29]

This is correct but might be confusing in the future. Can you please create a
local is_enabled variable that is set before this in a similar branching way
that you have in OnToggleToggled? e.g.:

is_enabled = false
if (handler->IsTechnologyAvailable(NetworkTypePattern::Cellular())) {
  ...
} else {
  ...
}

[stevenjb, 2017/05/23 22:11:07]

Or add an anonymous helper function: IsMobileTechnologyEnabled().

[lesliewatkins, 2017/05/26 23:49:32]

I'm not sure what you mean by this, as there is no is_enabled variable in
onToggleToggled, but I broke out is_enabled into a separate variable for better
readability. Also, the updates to TetherService make this logic a little
simpler, so hopefully it's less confusing now.

+             handler->IsTechnologyEnabled(NetworkTypePattern::Tether())),
+        index, &cellular_header_view_, &cellular_separator_view_);
   }
 
   // Cellular initializing.
@@ -561,31 +550,14 @@ NetworkListView::UpdateNetworkListEntries() {
   if (cellular_message_id)
     ++index;
 
-  // Add cellular networks.
+  // Add cellular and Tether networks.
+  // TODO (hansberry): Audit existing usage of NonVirtual and consider changing
+  // it to include Tether. See crbug.com/693647.
   std::unique_ptr<std::set<std::string>> new_cellular_guids =
       UpdateNetworkChildren(NetworkInfo::Type::CELLULAR, index);
   index += new_cellular_guids->size();
   new_guids->insert(new_cellular_guids->begin(), new_cellular_guids->end());
 
-  // TODO (hansberry): Audit existing usage of NonVirtual and consider changing
-  // it to include Tether. See crbug.com/693647.
-  if (handler->IsTechnologyAvailable(NetworkTypePattern::Tether())) {
-    index = UpdateSectionHeaderRow(
-        NetworkTypePattern::Tether(),
-        handler->IsTechnologyEnabled(NetworkTypePattern::Tether()), index,
-        &tether_header_view_, &tether_separator_view_);
-
-    // TODO (hansberry): Should a message similar to
-    // IDS_ASH_STATUS_TRAY_NO_CELLULAR_NETWORKS be shown if Tether technology is
-    // enabled but no networks are around?
-
-    // Add Tether networks.
-    std::unique_ptr<std::set<std::string>> new_tether_guids =
-        UpdateNetworkChildren(NetworkInfo::Type::TETHER, index);
-    index += new_tether_guids->size();
-    new_guids->insert(new_tether_guids->begin(), new_tether_guids->end());
-  }
-
   index = UpdateSectionHeaderRow(
       NetworkTypePattern::WiFi(),
       handler->IsTechnologyEnabled(NetworkTypePattern::WiFi()), index,
@@ -748,10 +720,9 @@ int NetworkListView::UpdateSectionHeaderRow(NetworkTypePattern pattern,
                                             SectionHeaderRowView** view,
                                             views::Separator** separator_view) {
   if (!*view) {
-    if (pattern.Equals(NetworkTypePattern::Cellular()))
+    if (pattern.Equals(NetworkTypePattern::Cellular()) ||
+        pattern.Equals(NetworkTypePattern::Tether()))

[stevenjb, 2017/05/23 22:11:07]

This could use Pattern::Mobile and then we won't need to add {} :)

[lesliewatkins, 2017/05/30 18:29:51]

Done.

       *view = new CellularHeaderRowView();
-    else if (pattern.Equals(NetworkTypePattern::Tether()))
-      *view = new TetherHeaderRowView();
     else if (pattern.Equals(NetworkTypePattern::WiFi()))
       *view = new WifiHeaderRowView();
     else