Disentangle module dependencies, breaks (most) cyclic dependencies.

There are basically 3 types of modules:
 - those that provide source or super-source
 - those that only provide configuration (deferred-binding, linker, etc.)
 - those that aggregate the above

The rule I followed is that non-source modules should try hard to not
import sources that are not already imported by their dependencies. They
use a <source path="null"/> to enforce that in some cases.
Additionally, configuration-only modules that are "private" (not intended
to being inherited directly by users) do not inherit any module, they just
assume the aggregate module that inherits them also inherits the required
dependencies and provides the sources.

To split the User module, RemoteService is made standalone, and a Cookies,
Random, Timer, and UI modules are introduced, along with TakesValue,
HasText, AsyncCallback and RemoteServiceApi to be used in Editor, I18N,
RPC and JSONP, and javax.validation respectively.
The c.g.g.user.HTTPRequest module is removed, as the HTTPRequest class that
it was tied to has been removed a long time ago.
Editor has been split so that it doesn't depend on UI, EditorUI has been
introduced for that, which UI inherits.
Finally, a ValidationBase module has been added so that javax.validation
can be inherited for its API, without inheriting the whole c.g.g.validation
module.

git fetch https://gwt.googlesource.com/gwt refs/changes/43/1243/9 && git cherry-pick FETCH_HEAD

Change-Id: I18ab07b3c31902c0af7fc4b0e716906265355329

Author: tbroyer

user/src/com/google/gwt/activity/Activity.gwt.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module>
   <inherits name='com.google.gwt.place.Place'/>
+  <inherits name='com.google.gwt.user.UI'/>
 
   <source path="shared"/>
 </module>

user/src/com/google/gwt/animation/Animation.gwt.xml

@@ -18,10 +18,9 @@
 <!--                                                                        -->
 <module>
   <inherits name="com.google.gwt.core.Core"/>
-  <inherits name="com.google.gwt.user.UserAgent"/>
-  
-  <!-- Include User module to inherit Timer -->
-  <inherits name="com.google.gwt.user.User"/>
+  <inherits name="com.google.gwt.useragent.UserAgent"/>
+
+  <inherits name="com.google.gwt.user.Timer"/>
 
   <!-- Fallback implementation, based on a timer -->
   <replace-with class="com.google.gwt.animation.client.AnimationSchedulerImplTimer">

user/src/com/google/gwt/canvas/Canvas.gwt.xml

@@ -14,7 +14,7 @@
   the License.
 -->
 <module>
-  <inherits name="com.google.gwt.user.User"/>
+  <inherits name="com.google.gwt.user.UI"/>
   <inherits name="com.google.gwt.canvas.dom.DOM"/>
 
   <!-- Define the support property -->

user/src/com/google/gwt/cell/Cell.gwt.xml

@@ -17,6 +17,8 @@
   <inherits name="com.google.gwt.dom.DOM"/>
   <inherits name="com.google.gwt.safehtml.SafeHtml"/>
   <inherits name="com.google.gwt.text.Text"/>
+  <inherits name="com.google.gwt.user.UI"/>
+  <inherits name="com.google.gwt.user.datepicker.DatePicker"/>
 
   <inherits name="com.google.gwt.cell.TextButtonCell"/>
 

user/src/com/google/gwt/cell/TextButtonCell.gwt.xml

@@ -14,13 +14,7 @@
   the License.
 -->
 <module>
-  <inherits name="com.google.gwt.dom.DOM"/>
-  <inherits name="com.google.gwt.safehtml.SafeHtml"/>
-  <inherits name="com.google.gwt.text.Text"/>
-
   <replace-with class="com.google.gwt.cell.client.TextButtonCell.DefaultAppearance">
     <when-type-is class="com.google.gwt.cell.client.TextButtonCell.Appearance" />
   </replace-with>
-
-  <source path="client"/>
 </module>

user/src/com/google/gwt/dom/DOM.gwt.xml

@@ -19,7 +19,9 @@
 <module>
   <inherits name="com.google.gwt.core.Core"/>
   <inherits name="com.google.gwt.safehtml.SafeHtml"/>
-  <inherits name="com.google.gwt.user.UserAgent"/>
+  <inherits name="com.google.gwt.useragent.UserAgent"/>
+  <inherits name="com.google.gwt.canvas.dom.DOM"/>
+  <inherits name="com.google.gwt.media.dom.DOM"/>
 
   <replace-with class="com.google.gwt.dom.client.DOMImplOpera">
     <when-type-is class="com.google.gwt.dom.client.DOMImpl"/>

user/src/com/google/gwt/dom/builder/DomBuilder.gwt.xml

@@ -20,6 +20,7 @@
   <inherits name="com.google.gwt.core.Core"/>
   <inherits name="com.google.gwt.dom.DOM"/>
   <inherits name="com.google.gwt.safehtml.SafeHtml"/>
+  <inherits name="com.google.gwt.safecss.SafeCss"/>
 
   <!-- Default to string concatenation with inner HTML. -->
   <!-- TODO(jlabanca): Research performance using different methods.  -->

user/src/com/google/gwt/editor/Editor.gwt.xml

@@ -14,11 +14,11 @@
 <!-- Editor framework support -->
 <module>
   <inherits name="com.google.gwt.core.Core" />
-  <inherits name="com.google.gwt.validation.Validation" />
+  <inherits name="com.google.gwt.event.EventBase" />
+  <inherits name="com.google.gwt.user.TakesValue" />
+  <inherits name="javax.validation.Validation" />
 
-  <source path="client"/>
-  <source path="shared"/>
-  <source path="ui/client"/>
+  <source path="client" skips="adapters/HasDataEditor.java"/>
 
   <generate-with class="com.google.gwt.editor.rebind.SimpleBeanEditorDriverGenerator">
     <when-type-assignable class="com.google.gwt.editor.client.SimpleBeanEditorDriver" />

user/src/com/google/gwt/editor/EditorUI.gwt.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" ?>
+<!--
+  Copyright 2010 Google Inc. Licensed under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License. You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
+  or agreed to in writing, software distributed under the License is
+  distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the specific language
+  governing permissions and limitations under the License.
+-->
+
+<!-- Editor framework support -->
+<module>
+  <inherits name="com.google.gwt.editor.Editor" />
+  <inherits name="com.google.gwt.editor.HasDataEditor" />
+  <inherits name="com.google.gwt.user.UI" />
+
+  <source path="ui/client"/>
+</module>

user/src/com/google/gwt/editor/HasDataEditor.gwt.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" ?>
+<!--
+  Copyright 2010 Google Inc. Licensed under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License. You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
+  or agreed to in writing, software distributed under the License is
+  distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+  KIND, either express or implied. See the License for the specific language
+  governing permissions and limitations under the License.
+-->
+
+<!-- Editor framework support -->
+<module>
+  <inherits name="com.google.gwt.editor.Editor" />
+  <inherits name="com.google.gwt.view.View" />
+
+  <source path="client" includes="adapters/HasDataEditor.java"/>
+</module>