Add BlimpClientContext and factory with real and dummy implementation

blimp/client/core/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.
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
 
+declare_args() {
+  # Enables blimp. This is required to get the real implementation of blimp.
+  # By default, only a dummy-implementation is provided.
+  enable_blimp = false
+}
+
+# This target is here to let //chrome depend on //blimp/client/public
+# and automatically get the correct implementation of //blimp/client/core
+# depending on whether enable_blimp is set or not.
+group("core_shim") {
+  visibility = [ "//blimp/client/public" ]
+
+  if (enable_blimp) {
+    deps = [
+      ":core",
+    ]
+  } else {
+    deps = [
+      ":dummy_core",
+    ]
+  }
+}
+
 source_set("core") {
-  visibility = [ "//blimp/*" ]
+  visibility = [ "//blimp/client/*" ]
 
   sources = [
+    "blimp_client_context_impl.cc",
+    "blimp_client_context_impl.h",
     "blimp_contents_impl.cc",
     "blimp_contents_impl.h",
     "blimp_navigation_controller_delegate.h",
     "blimp_navigation_controller_impl.cc",
     "blimp_navigation_controller_impl.h",
   ]
 
   deps = [
     "//base",
-    "//blimp/client/public",
+    "//blimp/client/public:public_headers",
     "//url",
   ]
 
   if (is_android) {
     sources += [
+      "android/blimp_client_context_impl_android.cc",
+      "android/blimp_client_context_impl_android.h",
       "android/blimp_contents_factory.cc",
       "android/blimp_contents_factory.h",
       "android/blimp_contents_impl_android.cc",
       "android/blimp_contents_impl_android.h",
       "android/blimp_contents_observer_proxy.cc",
       "android/blimp_contents_observer_proxy.h",
+      "android/blimp_jni_registrar.cc",
       "android/blimp_navigation_controller_impl_android.cc",
       "android/blimp_navigation_controller_impl_android.h",
     ]
 
-    deps += [ "//blimp/client/core:core_jni_headers" ]
+    deps += [ ":core_jni_headers" ]
   }
 }
 
+source_set("dummy_core") {
+  visibility = [ ":*" ]
+
+  sources = [
+    "dummy_blimp_client_context.cc",
+    "dummy_blimp_client_context.h",
+  ]
+
+  deps = [
+    "//base",
+    "//blimp/client/public:public_headers",
+    "//url",
+  ]
+
+  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_core_jni_headers" ]
+  }
+}
+
 source_set("unit_tests") {
   testonly = true
 
   sources = [
+    "blimp_client_context_impl_unittest.cc",
     "blimp_contents_impl_unittest.cc",
     "blimp_navigation_controller_impl_unittest.cc",
   ]
 
   deps = [
+    ":core",
     "//base",
-    "//blimp/client/core",
-    "//blimp/client/public",
+    "//blimp/client/public:public_headers",
+    "//blimp/client/test",
     "//testing/gtest",
     "//url",
   ]
 }
 
 if (is_android) {
+  # This target is here to let //chrome depend on
+  # //blimp/client/public:public_java and automatically get the correct
+  # implementation of //blimp/client/core depending on whether enable_blimp is
+  # set or not.
+  java_group("core_shim_java") {
+    visibility = [ "//blimp/client/public/*" ]
+
+    if (enable_blimp) {
+      deps = [
+        ":core_java",
+      ]
+    } else {
+      deps = [
+        ":dummy_core_java",
+      ]
+    }
+  }
+
   android_library("core_java") {
-    visibility = [ "//blimp/*" ]
+    visibility = [ "//blimp/client/*" ]
 
     java_files = [
+      "android/java/src/org/chromium/blimp/core/BlimpClientContextImpl.java",
       "android/java/src/org/chromium/blimp/core/BlimpContentsFactory.java",
       "android/java/src/org/chromium/blimp/core/BlimpContentsImpl.java",
       "android/java/src/org/chromium/blimp/core/BlimpContentsObserverProxy.java",
       "android/java/src/org/chromium/blimp/core/BlimpNavigationControllerImpl.java",
     ]
 
     deps = [
       "//base:base_java",
-      "//blimp/client/public:public_java",
+      "//blimp/client/public:public_headers_java",
+    ]
+  }
+
+  android_library("dummy_core_java") {
+    visibility = [ ":*" ]
+
+    java_files = [ "android/java/src/org/chromium/blimp/core/DummyBlimpClientContext.java" ]
+
+    deps = [
+      "//base:base_java",
+      "//blimp/client/public:public_headers_java",
     ]
   }
 
   generate_jni("core_jni_headers") {
+    visibility = [ ":*" ]
+
     sources = [
+      "android/java/src/org/chromium/blimp/core/BlimpClientContextImpl.java",
       "android/java/src/org/chromium/blimp/core/BlimpContentsFactory.java",
       "android/java/src/org/chromium/blimp/core/BlimpContentsImpl.java",
       "android/java/src/org/chromium/blimp/core/BlimpContentsObserverProxy.java",
       "android/java/src/org/chromium/blimp/core/BlimpNavigationControllerImpl.java",
     ]
 
-    jni_package = "blimp"
+    jni_package = "blimp/client/core"
+  }
+
+  generate_jni("dummy_core_jni_headers") {
+    visibility = [ ":*" ]
+
+    sources = [
+      "android/java/src/org/chromium/blimp/core/DummyBlimpClientContext.java",
+    ]
+
+    jni_package = "blimp/client/core"
   }
 }