GN: Change group deps to public_deps.

During GN vs GYP auditing it was discovered that some
GN targets that had public_configs were not exposing them
to dependents where the dependent depended on a group, which
in turn included that target as a dependency. Instead of
changing those public_configs to all_dependent_configs
(which would be a change from GYP), it's better to just change
those group targets to use public_deps instead.

BUG=webrtc:6323
NOTRY=True
TESTED=Generated GYP and GN project files on Mac and ran the
tools/gyp_flag_compare.py script before and after this patch was
applied. The file in question used for inspection was the
webrtc/api/webrtcsessiondescriptionfactory.cc
which is a part of the libjingle_peerconnection target.

Review-Url: https://codereview.webrtc.org/2344623002
Cr-Commit-Position: refs/heads/master@{#14222}

webrtc/api/BUILD.gn

@@ -13,7 +13,7 @@ if (is_android) {
 }
 
 group("api") {
-  deps = [
+  public_deps = [
     ":libjingle_peerconnection",
   ]
 }

webrtc/examples/BUILD.gn

@@ -20,13 +20,13 @@ if (is_linux) {
 }
 
 group("examples") {
-  deps = []
+  public_deps = []
 
   if (is_android) {
-    deps += [ ":AppRTCDemo" ]
+    public_deps += [ ":AppRTCDemo" ]
   }
   if (is_linux) {
-    deps += [
+    public_deps += [
       ":peerconnection_client",
       ":peerconnection_server",
       ":relayserver",

webrtc/libjingle/xmllite/BUILD.gn

@@ -9,7 +9,7 @@
 import("../../build/webrtc.gni")
 
 group("xmllite") {
-  deps = [
+  public_deps = [
     ":rtc_xmllite",
   ]
 }

webrtc/libjingle/xmpp/BUILD.gn

@@ -9,7 +9,7 @@
 import("../../build/webrtc.gni")
 
 group("xmpp") {
-  deps = [
+  public_deps = [
     ":rtc_xmpp",
   ]
 }

webrtc/media/BUILD.gn

@@ -10,7 +10,7 @@ import("//build/config/linux/pkg_config.gni")
 import("../build/webrtc.gni")
 
 group("media") {
-  deps = [
+  public_deps = [
     ":rtc_media",
   ]
 }

webrtc/modules/BUILD.gn

@@ -15,7 +15,7 @@ declare_args() {
 }
 
 group("modules") {
-  deps = [
+  public_deps = [
     "audio_coding",
     "audio_conference_mixer",
     "audio_device",

webrtc/p2p/BUILD.gn

@@ -9,7 +9,7 @@
 import("../build/webrtc.gni")
 
 group("p2p") {
-  deps = [
+  public_deps = [
     ":rtc_p2p",
   ]
 }

webrtc/pc/BUILD.gn

@@ -9,7 +9,7 @@
 import("../build/webrtc.gni")
 
 group("pc") {
-  deps = [
+  public_deps = [
     ":rtc_pc",
   ]
 }

webrtc/stats/BUILD.gn

@@ -9,7 +9,7 @@
 import("../build/webrtc.gni")
 
 group("stats") {
-  deps = [
+  public_deps = [
     ":rtc_stats",
   ]
 }