GN: Add mojo_shell_tests, get more things working on android

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 25797eb83e653cdfe6b81515f0082ea310432d53..dd74ed550e9d1d7802ffd4aa1364d36677ad67be 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -162,7 +162,6 @@ group("root") {
     ]
 
     deps -= [
-      "//cc",
       "//chrome/browser",  # Blocked on content.
       "//chrome/browser/devtools",  # Blocked on content.
       "//chrome/browser/ui",  # Blocked on content.
@@ -179,13 +178,15 @@ group("root") {
       "//extensions/common",
       "//extensions/common/api",
       "//extensions/renderer",
-      "//mojo", # Blocked on GN toolchain support: https://codereview.chromium.org/428633006/
       "//pdf",  # Not compiled on Android in GYP yet, either.
       "//ppapi:ppapi_c",
       "//sandbox",
       "//third_party/libusb",
       "//ui/keyboard",  # Blocked on content.
 
+      # Blocked on neon stuff in vp8
+      "//third_party/WebKit/public:all_blink",
+
       # Seems to not be compiled on Android. Otherwise it will need a config.h.
       "//third_party/libxslt",
 
@@ -201,9 +202,6 @@ group("root") {
       "//third_party/flac",
       "//breakpad:symupload",
 
-      # TODO(brettw) make Blink work on Android.
-      "//third_party/WebKit/public:all_blink",
-
       # Not tested on Android yet:
       "//google_apis/gcm",
       "//third_party/cld_2",