Enable "gn check" for //third_party/blink/renderer/platform/network

It has a circular dependency with platform/loader:loader. This CL adds
allow_circular_includes_from to platform/loader:loader.

This CL has no behavior changes.

Bug: 800764
Change-Id: Ib511a3c8628e1e39b6c458cd51d0dd9a8598bd9f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2400588
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805624}

.gn

@@ -257,7 +257,6 @@ no_check_targets = [
   "//third_party/blink/renderer/modules/peerconnection:*",  # 43 errors
   "//third_party/blink/renderer/modules/webtransport:*",  # 16 errors
   "//third_party/blink/renderer/modules:*",  # 321 errors
-  "//third_party/blink/renderer/platform/network:*",  # 15 errors
   "//third_party/blink/renderer/platform:*",  # 72 errors
 
   "//third_party/breakpad:*",  # 34 errors

third_party/blink/renderer/platform/BUILD.gn

@@ -1564,6 +1564,7 @@ component("platform") {
     "//third_party/blink/renderer/platform/heap:heap",
     "//third_party/blink/renderer/platform/instrumentation",
     "//third_party/blink/renderer/platform/loader:loader",
+    "//third_party/blink/renderer/platform/network:network",
     "//third_party/blink/renderer/platform/scheduler",
   ]
 

third_party/blink/renderer/platform/loader/BUILD.gn

@@ -150,6 +150,8 @@ blink_platform_sources("loader") {
     "//third_party/blink/renderer/platform/scheduler:scheduler",
   ]
   public_deps = [ "//third_party/blink/renderer/platform/heap:heap" ]
+  allow_circular_includes_from =
+      [ "//third_party/blink/renderer/platform/network:network" ]
 }
 
 source_set("unit_tests") {

third_party/blink/renderer/platform/network/BUILD.gn

@@ -64,7 +64,11 @@ blink_platform_sources("network") {
 
   sources += get_target_outputs(":http_names")
 
-  deps = [ "//media" ]
+  deps = [
+    "//media",
+    "//third_party/blink/renderer/platform/blob:blob",
+    "//third_party/blink/renderer/platform/scheduler:scheduler",
+  ]
 }
 
 source_set("unit_tests") {
@@ -84,7 +88,11 @@ source_set("unit_tests") {
 
   configs += [ "//third_party/blink/renderer/platform:blink_platform_config" ]
 
-  deps = [ "//testing/gtest" ]
+  deps = [
+    "//mojo/public/cpp/test_support:test_utils",
+    "//testing/gtest",
+    "//third_party/blink/renderer/platform:test_support",
+  ]
   public_deps = [ "//third_party/blink/renderer/platform:platform" ]
 }
 
@@ -101,6 +109,7 @@ source_set("test_support") {
 
   public_deps = [
     "//net",
+    "//third_party/blink/public:blink_headers",
     "//third_party/blink/renderer/platform/blob:generator",
   ]
 }