gn: Fix gn build so cloud_print_unittests doesn't fail.

content/common/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/common/common.gni")
 import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
 if (is_chromeos && current_cpu != "arm") {
@@ skipping 220 matching lines @@
     ]
 
     deps += [
       "//content/public/android:jni",
       "//content/public/android:common_aidl",
     ]
 
     libs += [ "android" ]
   }
 
+  if (is_debug && !is_component_build) {
+    # Content depends on the PPAPI message logging stuff; if this isn't here,
+    # some unit test binaries won't compile. This only worked in release mode
+    # because logging is disabled there.
+    deps += [ "//ppapi/proxy:ipc_sources" ]
+  }
+
   if (is_ios) {
     sources -= [ "user_agent.cc" ]
     assert(false, "Need to add lots of conditions here")
   }
 
   if (use_ozone) {
     deps += [
       "//ui/ozone:ozone",
       "//ui/ozone:ozone_base",
       "//ui/ozone/gpu",
@@ skipping 219 matching lines @@
     "permission_service.mojom",
     "presentation/presentation_service.mojom",
     "render_frame_setup.mojom",
   ]
 
   deps = [
     "//content/public/common:mojo_bindings",
     "//third_party/mojo/src/mojo/public/interfaces/application:application",
   ]
 }