[Android] Upstreamed Stars UMA from iOS.

There are some UMA strings, enum constants in iOS repository
that can be shared with Android, so moved to components.

BUG=452254

Review URL: https://codereview.chromium.org/891493003

Cr-Commit-Position: refs/heads/master@{#314707}

chrome/android/BUILD.gn

@@ -108,6 +108,7 @@ android_library("chrome_java") {
     "//chrome:page_info_connection_type_javagen",
     "//chrome:content_setting_javagen",
     "//chrome:content_settings_type_javagen",
+    "//components/enhanced_bookmarks:enhanced_bookmarks_launch_location_srcjar",
   ]
 
   DEPRECATED_java_in_dir = "java/src"

chrome/chrome.gyp

@@ -616,6 +616,7 @@
             '../base/base.gyp:base',
             '../components/components.gyp:bookmarks_java',
             '../components/components.gyp:dom_distiller_core_java',
+            '../components/components.gyp:enhanced_bookmarks_launch_location_srcjar',
             '../components/components.gyp:gcm_driver_java',
             '../components/components.gyp:invalidation_java',
             '../components/components.gyp:navigation_interception_java',

components/enhanced_bookmarks.gypi

@@ -92,4 +92,20 @@
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
+  'conditions' : [
+    ['OS=="android"', {
+      'targets': [
+        {
+          # GN: //components/enhanced_bookmarks:enhanced_bookmarks_launch_location_srcjar
+          'target_name': 'enhanced_bookmarks_launch_location_srcjar',
+          'type': 'none',
+          'variables': {
+            'source_file': 'enhanced_bookmarks/enhanced_bookmark_utils.h',
+          },
+          'includes': [ '../build/android/java_cpp_enum.gypi' ],
+        },
+      ],
+     },
+   ],
+  ],
 }

components/enhanced_bookmarks/BUILD.gn

@@ -2,6 +2,11 @@
 # 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")
+}
+
 # GYP: //components/enhanced_bookmarks.gypi:enhanced_bookmarks
 source_set("enhanced_bookmarks") {
   sources = [
@@ -49,6 +54,18 @@ source_set("enhanced_bookmarks") {
   }
 }
 
+if (is_android) {
+  # GYP: //components/enhanced_bookmarks.gypi:enhanced_bookmarks_launch_location_srcjar
+  java_cpp_enum("enhanced_bookmarks_launch_location_srcjar") {
+    sources = [
+      "enhanced_bookmark_utils.h",
+    ]
+    outputs = [
+      "org/chromium/chrome/browser/enhancedbookmark/LaunchLocation.java",
+    ]
+  }
+}
+
 # GYP: //components/enhanced_bookmarks.gypi:enhanced_bookmarks_test_support
 source_set("test_support") {
   testonly = true

components/enhanced_bookmarks/enhanced_bookmark_utils.h

@@ -16,6 +16,23 @@ class BookmarkNode;
 
 namespace enhanced_bookmarks {
 
+static const char kLaunchLocationUMA[] = "Stars.LaunchLocation";
+
+// Possible locations where a bookmark can be opened from.
+// Please sync with the corresponding histograms.xml.
+//
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser.enhancedbookmark
+enum LaunchLocation {
+  ALL_ITEMS = 0,
+  UNCATEGORIZED = 1,  // Deprecated.
+  FOLDER = 2,
+  FILTER = 3,
+  SEARCH = 4,
+  BOOKMARK_EDITOR = 5,
+  COUNT = 6,
+};
+
 // The vector is sorted in place.
 // All of the bookmarks in |nodes| must be urls.
 void SortBookmarksByName(std::vector<const bookmarks::BookmarkNode*>& nodes);