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, 1 insertions, 0 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 77b950f..5206979 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -180,6 +180,7 @@ group("root") {
   if (is_android) {
     deps += [
       "//base/android/linker:chromium_android_linker",
+      "//build/android/gyp/test:hello_world",
       "//build/android/rezip",
       "//third_party/openmax_dl/dl",
       "//content/shell/android:content_shell_apk",