Greatly improve (non-android) java support

This change fixes java_library and java_prebuilt to actually construct a
classpath based on their dependents. It adds java_binary that is similar
to java_library but also creates a script in $root_build_dir/bin/ to
actually run a java jar (it builds in the classpath and main class so
that it can just be run like a normal executable).

Adds the flags "android" and "has_android_platform" to the java_library
template. An android_library can depend on a java_library only if the
java_libary has "android == true". A java_library can depend on an
android_library only if the java_libary has
"has_android_platform == true".

This merges several of the paths for compiling java between android and
non-android implementations into a single one that just takes a flag
controlling it's behavior (enabling/disabling dex, for example).

Adds a very simple java_binary target. This can be run to ensure it works,
output is printed, and exit code is propagated.

TBR=brettw
BUG=359249,383646,417843

Review URL: https://codereview.chromium.org/687633003

Cr-Commit-Position: refs/heads/master@{#304555}

1 files changed, 3 insertions, 5 deletions

diff --git a/testing/android/junit/BUILD.gn b/testing/android/junit/BUILD.gn
index bd8b517..5c668d5 100644
--- a/testing/android/junit/BUILD.gn
+++ b/testing/android/junit/BUILD.gn
@@ -6,22 +6,20 @@ assert(is_android)
 
 import("//build/config/android/rules.gni")
 
-# TODO(GYP): should be java_library
 # GYP: //testing/android/junit_test.gyp:junit_test_support
-android_library("junit_test_support") {
+java_library("junit_test_support") {
   DEPRECATED_java_in_dir = "java/src"
   deps = [
     "//third_party/junit"
   ]
 }
 
-# TODO(GYP): should be java_library
 # GYP: //testing/android/junit_test.gyp:junit_unit_tests
-android_library("junit_unittests") {
+java_binary("junit_unittests") {
   deps = [
     ":junit_test_support",
     "//third_party/junit",
   ]
-#main_class = "org.chromium.testing.local.JuniTestMain"
+  main_class = "org.chromium.testing.local.JunitTestMain"
   DEPRECATED_java_in_dir = "javatests/src"
 }