Add BlimpClientContext and factory with real and dummy implementation

blimp/client/dummy/BUILD.gn

+# Copyright 2016 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("//blimp/blimp.gni")
+
+assert(!enable_blimp)
+
+if (is_android) {
+  import("//build/config/android/config.gni")
+  import("//build/config/android/rules.gni")
+}
+
+source_set("dummy") {
+  sources = [
+    "dummy_blimp_client_context.cc",
+    "dummy_blimp_client_context.h",
+  ]
+
+  deps = [
+    "//base",
+    "//blimp/client/public",
+  ]
+
+  if (is_android) {
+    sources += [
+      "android/dummy_blimp_client_context_android.cc",
+      "android/dummy_blimp_client_context_android.h",
+      "android/dummy_blimp_jni_registrar.cc",
+    ]
+
+    deps += [ ":dummy_jni_headers" ]
+  }
+}
+
+if (is_android) {
+  android_library("dummy_java") {
+    java_files = [ "android/java/src/org/chromium/blimp/dummy/DummyBlimpClientContext.java" ]
+    deps = [
+      "//base:base_java",
+      "//blimp/client/public:public_java",
+    ]
+  }
+
+  generate_jni("dummy_jni_headers") {
+    sources = [
+      "android/java/src/org/chromium/blimp/dummy/DummyBlimpClientContext.java",
+    ]
+
+    jni_package = "blimp/client/dummy"
+  }
+}