Introduce a layering in the invalidation component as public and impl.

The invalidation component has dependencies due to specific
implementations of the inv_client, inv_service etc.
Consumers of invalidations do not need to depend on these.

This change exports the InvalidationHandler interface in a separate target
'invalidation_public' which only depends on //google/cacheinvalidation

Thus the signin component can implement to InvalidationHandler to refresh
account information without introducing a cyclic dependency.

The crux of the change is:

Move {components/invalidation/ => components/invalidation/public}:
-ack_handle.cc
-ack_handle.h
-ack_handler.cc
-ack_handler.h
-invalidation.cc
-invalidation.h
-invalidation_export.h
-invalidation_handler.cc
-invalidation_handler.h
-invalidation_service.h
-invalidation_util.cc
-invalidation_util.h
-invalidator_state.cc
-invalidator_state.h
-object_id_invalidation_map.cc
-object_id_invalidation_map.h
-single_object_invalidation_set.cc
-single_object_invalidation_set.h

Move {components/invalidation/ => components/invalidation/impl}:
other files

Thus the dependency chain is:
//chrome/browser/ -> //components/invalidation/impl -> components/invalidation/public

Now invalidation consumers can directly depend on //components/invalidation/public
which has only //google/cacheinvalidation has a dependency.

BUG=503131

Review URL: https://codereview.chromium.org/1191393008

Cr-Commit-Position: refs/heads/master@{#336413}

2 files changed, 2 insertions, 2 deletions

diff --git a/components/test/DEPS b/components/test/DEPS
index 88da157..b734027 100644
--- a/components/test/DEPS
+++ b/components/test/DEPS
@@ -1,7 +1,7 @@
 include_rules = [
   # To initialize the global data of content_settings.
   "+components/content_settings/core/common",
-  "+components/invalidation/android/component_jni_registrar.h",
+  "+components/invalidation/impl/android/component_jni_registrar.h",
   "+content/public/android/java/src/org/chromium/content/browser",
   "+content/public/app/content_jni_onload.h",
   "+content/public/app/content_main.h",
diff --git a/components/test/run_all_unittests.cc b/components/test/run_all_unittests.cc
index 9b59628..0c2dd10 100644
--- a/components/test/run_all_unittests.cc
+++ b/components/test/run_all_unittests.cc
@@ -22,7 +22,7 @@
 
 #if defined(OS_ANDROID)
 #include "base/android/jni_android.h"
-#include "components/invalidation/android/component_jni_registrar.h"
+#include "components/invalidation/impl/android/component_jni_registrar.h"
 #include "ui/base/android/ui_base_jni_registrar.h"
 #include "ui/gfx/android/gfx_jni_registrar.h"
 #endif