Moving all for test keeps into for test flags file.

testing/android/proguard_for_test.flags

Index: testing/android/proguard_for_test.flags
diff --git a/testing/android/proguard_for_test.flags b/testing/android/proguard_for_test.flags
index 51fe2f76558fa68efec6a50f61bbfe16f25997df..b016a06277986232c0b4f8837855b6625124db93 100644
--- a/testing/android/proguard_for_test.flags
+++ b/testing/android/proguard_for_test.flags
@@ -10,3 +10,94 @@
 # We don't optimize to prevent inlining functions our instrumentation tests rely
 # on.
 -dontoptimize
+
+# Keep for class level annotations.
+-keep @**.VisibleForTesting class *
+
+# Keeps for method level annotations.
+-keepclasseswithmembers class com.google.android.apps.chrome.** {
+  @**.VisibleForTesting <methods>;
+}
+-keepclasseswithmembers class org.chromium.** {
+  @**.VisibleForTesting <methods>;
+}
+
+# TODO(aurimas): figure out why we need to keep these classes.
+-keep class org.chromium.base.test.** {
+  *;
+}
+
+# Everything below this is kept because they are referenced by the test APK.
+-keep class android.support.v7.mediarouter.R* {
+  *;
+}
+
+-keep class android.support.v7.media.MediaRouteProvider** {
+  *;
+}
+
+-keep class android.support.v4.app.FragmentManager** {
+  *;
+}
+
+-keep class android.support.v4.app.DialogFragment** {
+  *;
+}
+
+-keep class android.support.v7.app.NotificationCompat** {
+  *;
+}
+
+-keep class android.support.v7.app.AlertDialog** {
+  *;
+}
+
+-keep class com.google.android.gms.cast.CastMediaControlIntent* {
+  *;
+}
+
+-keepnames class com.google.android.gms.gcm.** {
+  *;
+}
+
+-keepclassmembers class com.google.android.gms.gcm.TaskParams {
+  public <init>(java.lang.String);
+}
+
+-keepnames class jp.tomorrowkey.android.gifplayer.** {
+  public *;
+}
+
+# Used in tests.
+-keep class android.support.v4.view.ViewCompat {
+  public static int getLayoutDirection(android.view.View);
+}
+
+# flingViewport is used by Android WebView and a Chrome test.
+-keepclassmembers class org.chromium.content.browser.ContentViewCore {
+  public void flingViewport(long, int, int);
+}
+
+# Needed to compile ChromeTest.apk
+-keep class android.support.customtabs.** {
+  *;
+}
+
+# TODO(yfriedman): Remove when crbug.com/488192 is fixed.
+-dontwarn org.apache.http.conn.scheme.LayeredSocketFactory
+
+# Needed to run ChromeTest.apk
+-keepnames class com.google.android.gms.common.GoogleApiAvailability {
+  *;
+}
+
+# Needed for chrome_sync_shell_test_apk. Note - these do no affect chrome_apk's
+# size.
+-keep class org.chromium.sync.protocol.* { *; }
+
+# These resources are referenced in tests, but not in the real application.
+-keepclassmembers class org.chromium.chrome.R$id {
+  int webapp_splash_space;
+  int mr_chooser_list;
+  int find_toolbar;
+}