Explicitly depending on WebRTC targets.

WebRTC is stopping to use `public_deps` in its targets.
In https://webrtc-review.googlesource.com/c/src/+/29864 the removal
of the public dependency from //third_party/webrtc/pc:peerconnection
on //third_party/api:libjingle_peerconnection_api causes some errors
in the 'gn analyze' step of Chromium bots.

This CL is a forward compatible fix to allow WebRTC to land its CL.

Bug: webrtc:8603
Change-Id: Iab1b80a90e0fc6557e079274b3d3871fea01d811
Reviewed-on: https://chromium-review.googlesource.com/810968Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Mirko Bonadei <mbonadei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522379}

content/renderer/BUILD.gn

@@ -909,9 +909,12 @@ target(link_target_type, "renderer") {
       "//jingle:jingle_glue",
       "//third_party/libvpx",
       "//third_party/opus",
+      "//third_party/webrtc/api:libjingle_api_deprecated_headers",
       "//third_party/webrtc/api:libjingle_logging_api",
       "//third_party/webrtc/api:libjingle_peerconnection",
+      "//third_party/webrtc/api:libjingle_peerconnection_api",
       "//third_party/webrtc/api:optional",
+      "//third_party/webrtc/api:peerconnection_and_implicit_call_api",
       "//third_party/webrtc/api:rtc_stats_api",
       "//third_party/webrtc/api:video_frame_api",
       "//third_party/webrtc/api:video_frame_api_i420",
@@ -938,6 +941,7 @@ target(link_target_type, "renderer") {
       "//third_party/webrtc/p2p:libstunprober",
       "//third_party/webrtc/p2p:rtc_p2p",
       "//third_party/webrtc/pc:rtc_pc",
+      "//third_party/webrtc/pc:rtc_pc_base",
       "//third_party/webrtc/rtc_base:rtc_base",
       "//third_party/webrtc/rtc_base:rtc_task_queue",
       "//third_party/webrtc/stats",

content/test/BUILD.gn

@@ -395,6 +395,8 @@ static_library("test_support") {
 
     deps += [
       "//third_party/webrtc/api:libjingle_peerconnection",
+      "//third_party/webrtc/api:libjingle_peerconnection_api",
+      "//third_party/webrtc/api:peerconnection_and_implicit_call_api",
       "//third_party/webrtc/api:rtc_stats_api",
       "//third_party/webrtc/media:rtc_media_base",
       "//third_party/webrtc/modules/video_capture",
@@ -1845,6 +1847,8 @@ test("content_unittests") {
       "//third_party/libyuv",
       "//third_party/opus",
       "//third_party/webrtc/api:libjingle_peerconnection",
+      "//third_party/webrtc/api:libjingle_peerconnection_api",
+      "//third_party/webrtc/api:peerconnection_and_implicit_call_api",
       "//third_party/webrtc/api:rtc_stats_api",
       "//third_party/webrtc/api:video_frame_api",
       "//third_party/webrtc/api:video_frame_api_i420",