Add AAR support to Chrome and convert support libraries to using AARs

content/public/android/BUILD.gn

Index: content/public/android/BUILD.gn
diff --git a/content/public/android/BUILD.gn b/content/public/android/BUILD.gn
index 2bf40498231ff9824ab493f00e9359bc21000e34..b0e126252d08e9051240ceaeda8e5783231d43af 100644
--- a/content/public/android/BUILD.gn
+++ b/content/public/android/BUILD.gn
@@ -50,7 +50,9 @@ android_library("content_java") {
     "//mojo/public/java:system",
     "//net/android:net_java",
     "//third_party/WebKit/public:blink_headers_java",
+    "//third_party/android_tools:android_support_annotations_java",
     "//third_party/android_tools:android_support_v13_java",

[Ian Wen, 2016/07/15 01:36:21]

Q: In third_party/android, I already made v13 to depend on annotations and v4.
Why is that I have to specifically say them again in all the places that
references v13?

If I remove annotations and v4, this won't compile.

[agrieve, 2016/07/15 14:34:41]

When compiling, we set the classpath only to direct dependents. If we wanted
though, we could actually make this work using:

java_group("support_v13_java") {
  deps = [ ":support_v13_for_realz", ":support_v4", ":support_annotations" ]
}

+    "//third_party/android_tools:android_support_v4_java",
     "//third_party/jsr-305:jsr_305_javalib",
     "//ui/accessibility:ui_accessibility_java",
     "//ui/android:ui_java",