Add a new CldDataSource class that can be queried at runtime.

This will allow several "#if defined" statements to be replaced with runtime
checks, simplifying the build process and eliminating the need to generate
multiple libraries for several targets when building Android's chrome_shell
in the presence of non-static CLD data sources.

BUG=367239
TBR=toyoshim

Review URL: https://codereview.chromium.org/422843009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@286177 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 82 insertions, 0 deletions

diff --git a/components/translate/content/common/BUILD.gn b/components/translate/content/common/BUILD.gn
index 0125046..44affb3 100644
--- a/components/translate/content/common/BUILD.gn
+++ b/components/translate/content/common/BUILD.gn
@@ -8,6 +8,7 @@ static_library("common") {
   sources = [
     "translate_messages.cc",
     "translate_messages.h",
+    "cld_data_source.h",
   ]
 
   deps = [
@@ -24,4 +25,13 @@ static_library("common") {
       "data_file_cld_data_provider_messages.h",
     ]
   }
+  if (cld2_data_source == "standalone") {
+    sources += [ "standalone_cld_data_source.cc" ]
+  }
+  if (cld2_data_source == "component") {
+    sources += [ "component_cld_data_source.cc" ]
+  }
+  if (cld2_data_source == "static") {
+    sources += [ "static_cld_data_source.cc" ]
+  }
 }
diff --git a/components/translate/content/common/cld_data_source.h b/components/translate/content/common/cld_data_source.h
new file mode 100644
index 0000000..1ba6511
--- /dev/null
+++ b/components/translate/content/common/cld_data_source.h
@@ -0,0 +1,33 @@
+// 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.
+
+#ifndef COMPONENTS_TRANSLATE_CONTENT_COMMON_CLD_DATA_SOURCE_H_
+#define COMPONENTS_TRANSLATE_CONTENT_COMMON_CLD_DATA_SOURCE_H_
+
+#include <string>
+
+namespace translate {
+
+// Provides high-level functionality related to a CLD Data Source.
+class CldDataSource {
+
+ public:
+
+  // Returns the symbolic name of the data source. In the Chromium
+  // open-source tree, the following data sources exist:
+  // static       uses the static_[browser|renderer]_cld_data_provider
+  //              implementations.
+  // standalone   uses the data_file_[browser|renderer]_cld_data_provider
+  //              implementations.
+  // component    also uses the data_file_[browser|renderer]_cld_data_provider
+  //              implementations.
+  //
+  // Other implementations based upon Chromium may provide CLD differently and
+  // may have other names.
+  static std::string GetName();
+
+};
+
+}  // namespace translate
+#endif  // COMPONENTS_TRANSLATE_CONTENT_COMMON_CLD_DATA_SOURCE_H_
diff --git a/components/translate/content/common/component_cld_data_source.cc b/components/translate/content/common/component_cld_data_source.cc
new file mode 100644
index 0000000..cc493fc
--- /dev/null
+++ b/components/translate/content/common/component_cld_data_source.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "cld_data_source.h"
+
+namespace translate {
+
+  std::string CldDataSource::GetName() {
+    return "component";
+  }
+
+}  // namespace translate
diff --git a/components/translate/content/common/standalone_cld_data_source.cc b/components/translate/content/common/standalone_cld_data_source.cc
new file mode 100644
index 0000000..1e715c3
--- /dev/null
+++ b/components/translate/content/common/standalone_cld_data_source.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "cld_data_source.h"
+
+namespace translate {
+
+  std::string CldDataSource::GetName() {
+    return "standalone";
+  }
+
+}  // namespace translate
diff --git a/components/translate/content/common/static_cld_data_source.cc b/components/translate/content/common/static_cld_data_source.cc
new file mode 100644
index 0000000..b744abb
--- /dev/null
+++ b/components/translate/content/common/static_cld_data_source.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "cld_data_source.h"
+
+namespace translate {
+
+  std::string CldDataSource::GetName() {
+    return "static";
+  }
+
+}  // namespace translate