Fix missing dependency on java inputs for ContentShellTest.apk.

This was causing the test to occasionly not pick up changes.

Tested with: nbuild content_shell_test_apk && touch content/shell/android/javatests/src/org/chromium/content_shell/ContentShellUrlTest.java && nbuild content_shell_test_apk


Review URL: https://chromiumcodereview.appspot.com/10830171

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150210 0039d316-1c4b-4281-b951-d872f2087c98

content/content_tests.gypi

@@ -816,6 +816,7 @@
               'inputs': [
                 '<(DEPTH)/content/shell/android/javatests/content_shell_test_apk.xml',
                 '<(DEPTH)/content/shell/android/javatests/AndroidManifest.xml',
+                '<!@(find <(DEPTH)/content/shell/android/javatests/ -name "*.java")'
               ],
               'outputs': [
                 '<(PRODUCT_DIR)/content_shell_test/ContentShellTest-debug.apk',