Add BlimpClientContext and factory with real and dummy implementation

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 752 matching lines @@
     sources += rebase_path(gypi_values.chrome_browser_android_java_ui_sources,
                            ".",
                            "//chrome")
     sources += rebase_path(gypi_values.chrome_browser_offline_pages_sources,
                            ".",
                            "//chrome")
     deps += [
       ":client_discourse_context_proto",
       ":delta_file_proto",
       ":jni_headers",
+      "//blimp/client/public",
       "//components/data_usage/android",
       "//components/precache/content",
       "//components/precache/core",
       "//components/resources:components_resources",
       "//components/toolbar",
       "//components/web_contents_delegate_android",
     ]
   }
 
   if (is_android) {
@@ skipping 586 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }