Reland: Update build rules to support ARCore

In this change, I've moved the code in chrome_public_apk_tmpl from the
monochrome to he chrome template and ensured that apk_merger will pass.

> Define enable_arcore and add some build rules to use it.
>
> Bug: 833511
> Change-Id: I716123c2a282d7d123883df81ebbc00a0a883be8
> Reviewed-on: https://chromium-review.googlesource.com/1033580
> Commit-Queue: Ian Vollick <vollick@chromium.org>
> Reviewed-by: John Budorick <jbudorick@chromium.org>
> Reviewed-by: Eric Stevenson <estevenson@chromium.org>
> Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
> Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
> Reviewed-by: David Dorwin <ddorwin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#555174}

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_vr
Change-Id: I155d420f3b6606642cdfea43db48840f2c21a0cb
Reviewed-on: https://chromium-review.googlesource.com/1040905Reviewed-by: Tao Bai <michaelbai@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Will Harris <wfh@chromium.org>
Reviewed-by: Bill Orr <billorr@chromium.org>
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: Ian Vollick <vollick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#556200}

android_webview/tools/apk_merger.py

@@ -117,6 +117,11 @@ def CheckFilesExpected(actual_files, expected_files, component_build):
   duplicate_file_set = set(
       f for f, n in actual_file_names.iteritems() if n > 1)
 
+  # TODO(crbug.com/839191): Remove this once we're plumbing the lib correctly.
+  missing_file_set = set(
+      f for f in missing_file_set if not os.path.basename(f) ==
+      'libarcore_sdk_c_minimal.so')
+
   errors = []
   if unexpected_file_set:
     errors.append(
@@ -172,6 +177,16 @@ def MergeApk(args, tmp_apk, tmp_dir_32, tmp_dir_64):
   if args.has_unwind_cfi:
     expected_files['unwind_cfi_32'] = False
 
+  # TODO(crbug.com/839191): we should pass this in via script arguments.
+  if not args.loadable_module_32:
+    args.loadable_module_32.append('libarcore_sdk_c_minimal.so')
+
+  for f in args.loadable_module_32:
+    expected_files[f] = not args.uncompress_shared_libraries
+
+  for f in args.loadable_module_64:
+    expected_files[f] = not args.uncompress_shared_libraries
+
   # need to unpack APKs to compare their contents
   UnpackApk(args.apk_64bit, tmp_dir_64)
   UnpackApk(args.apk_32bit, tmp_dir_32)
@@ -195,8 +210,15 @@ def MergeApk(args, tmp_apk, tmp_dir_32, tmp_dir_64):
   CheckFilesExpected(diff_files, expected_files, args.component_build)
 
   with zipfile.ZipFile(tmp_apk, 'w') as out_zip:
-    build_utils.MergeZips(out_zip, [args.apk_64bit],
-                          exclude_patterns=['META-INF/*'])
+    exclude_patterns = ['META-INF/*']
+
+    # If there are libraries for which we don't want the 32 bit versions, we
+    # should remove them here.
+    if args.loadable_module_32:
+      exclude_patterns.extend(['*' + f for f in args.loadable_module_32 if
+                               f not in args.loadable_module_64])
+
+    build_utils.MergeZips(out_zip, [args.apk_64bit], exclude_patterns)
     AddDiffFiles(diff_files, tmp_dir_32, out_zip, expected_files,
                  args.component_build, args.uncompress_shared_libraries)
 
@@ -224,6 +246,12 @@ def main():
   parser.add_argument('--ignore-classes-dex', action='store_true')
   parser.add_argument('--has-unwind-cfi', action='store_true',
                       help='Specifies if the 32-bit apk has unwind_cfi file')
+  parser.add_argument('--loadable_module_32', action='append', default=[],
+                      help='Use for each 32-bit library added via '
+                      'loadable_modules')
+  parser.add_argument('--loadable_module_64', action='append', default=[],
+                      help='Use for each 64-bit library added via '
+                      'loadable_modules')
   args = parser.parse_args()
 
   if (args.zipalign_path is not None and

build/android/gyp/assert_static_initializers.py

@@ -27,8 +27,11 @@ def main():
   parser.add_argument('apk', help='APK file path.')
   args = parser.parse_args()
 
+  #TODO(crbug.com/838414): add support for files included via loadable_modules.
+  ignored_libs = ['libarcore_sdk_c_minimal.so']
+
   si_count = resource_sizes.AnalyzeStaticInitializers(
-      args.apk, args.tool_prefix, False, '.')
+      args.apk, args.tool_prefix, False, '.', ignored_libs)
   if si_count != args.expected_count:
     print 'Expected {} static initializers, but found {}.'.format(
         args.expected_count, si_count)
@@ -40,7 +43,7 @@ def main():
       print 'Dumping static initializers via dump-static-initializers.py:'
       sys.stdout.flush()
       resource_sizes.AnalyzeStaticInitializers(
-          args.apk, args.tool_prefix, True, '.')
+          args.apk, args.tool_prefix, True, '.', ignored_libs)
       print
       print 'If the above list is not useful, consider listing them with:'
       print '    //tools/binary_size/diagnose_bloat.py'

build/android/resource_sizes.py

@@ -562,12 +562,14 @@ def _AnnotatePakResources(out_dir):
 
 
 # This method also used by //build/android/gyp/assert_static_initializers.py
-def AnalyzeStaticInitializers(apk_filename, tool_prefix, dump_sis, out_dir):
+def AnalyzeStaticInitializers(apk_filename, tool_prefix, dump_sis, out_dir,
+                              ignored_libs):
   # Static initializer counting mostly copies logic in
   # infra/scripts/legacy/scripts/slave/chromium/sizes.py.
   with zipfile.ZipFile(apk_filename) as z:
     so_files = [f for f in z.infolist()
-                if f.filename.endswith('.so') and f.file_size > 0]
+                if f.filename.endswith('.so') and f.file_size > 0
+                and os.path.basename(f.filename) not in ignored_libs]
   # Skip checking static initializers for 32 bit .so files when 64 bit .so files
   # are present since the 32 bit versions will be checked by bots that only
   # build the 32 bit version. This avoids the complexity of finding 32 bit .so
@@ -703,6 +705,9 @@ def main():
                          dest='dump_sis',
                          help='Run dump-static-initializers.py to get the list'
                               'of static initializers (slow).')
+  argparser.add_argument('--loadable_module',
+                         action='append',
+                         help='Use for libraries added via loadable_modules')
   argparser.add_argument('--estimate-patch-size',
                          action='store_true',
                          help='Include patch size estimates. Useful for perf '
@@ -730,8 +735,10 @@ def main():
   PrintApkAnalysis(args.apk, tool_prefix, out_dir, chartjson=chartjson)
   _PrintDexAnalysis(args.apk, chartjson=chartjson)
 
+  ignored_libs = args.loadable_module if args.loadable_module else []
+
   si_count = AnalyzeStaticInitializers(
-      args.apk, tool_prefix, args.dump_sis, out_dir)
+      args.apk, tool_prefix, args.dump_sis, out_dir, ignored_libs)
   perf_tests_results_helper.ReportPerfResult(
       chartjson, 'StaticInitializersCount', 'count', si_count, 'count')
 

chrome/android/chrome_public_apk_tmpl.gni

@@ -8,6 +8,7 @@ import("//build/config/locales.gni")
 import("//build/config/android/extract_unwind_tables.gni")
 import("//build/config/compiler/compiler.gni")
 import("//chrome/common/features.gni")
+import("//device/vr/buildflags/buildflags.gni")
 import("//third_party/leakcanary/config.gni")
 import("channel.gni")
 
@@ -193,5 +194,15 @@ template("monochrome_public_apk_tmpl") {
       proguard_configs += [ "//android_webview/apk/java/proguard.flags" ]
       png_to_webp = true
     }
+
+    if (enable_arcore) {
+      deps += [
+        "//third_party/arcore-android-sdk:libarcore_library",
+        "//third_party/arcore-android-sdk:libdynamite_client_java",
+      ]
+
+      # We store this as a separate .so in the APK and only load as needed.
+      loadable_modules = [ "${root_out_dir}/libarcore_sdk_c_minimal.so" ]
+    }
   }
 }

device/vr/buildflags/buildflags.gni

@@ -5,6 +5,7 @@
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/gclient_args.gni")
+import("//chrome/android/channel.gni")
 
 declare_args() {
   # TODO(733935): Enable for other Android architectures too. Currently we only
@@ -29,4 +30,11 @@ declare_args() {
 
   # Whether to include VR extras like test APKs in non-VR-specific targets
   include_vr_data = false
+
+  # TODO(crbug.com/837999): We currently only support arm and arm64 and we are
+  # limiting to canary and dev until binary size issues are resolved.
+  enable_arcore = is_android && !is_chromecast &&
+                  (current_cpu == "arm" || current_cpu == "arm64") &&
+                  (android_channel == "default" || android_channel == "dev" ||
+                   android_channel == "canary")
 }

third_party/arcore-android-sdk/BUILD.gn

@@ -18,11 +18,11 @@ source_set("libarcore_sdk") {
 }
 
 copy("libarcore_library") {
-  if (target_cpu == "arm") {
+  if (current_cpu == "arm") {
     sources = [
       "libraries/android_arm/libarcore_sdk_c_minimal.so",
     ]
-  } else if (target_cpu == "arm64") {
+  } else if (current_cpu == "arm64") {
     sources = [
       "libraries/android_arm64/libarcore_sdk_c_minimal.so",
     ]

third_party/arcore-android-sdk/README.chromium

@@ -16,5 +16,10 @@ To address binary size concerns, we are using a minimal shim produced for
 Chromium that is not publicly distributed elsewhere. We have also stripped the
 .so's to minimize their size.
 
+Also, added BUILD.gn for compilation in chrome.
+
 The LICENSE file is taken from
  * https://github.com/google-ar/arcore-unity-sdk/blob/master/LICENSE
+
+Changes:
+2018-05-04 - Updated BUILD.gn to work properly for arm64.