Upgrade GWT to version 2.8.2

This version includes a fix for incorrect getAbsoluteLeft/Top values in
Chrome 61 and later [1], plus various other bugfixes. See the release
notes [2] for full details.

See also the release notes for 2.8.1 [3] which is also included in this
upgrade.

[1] https://github.com/gwtproject/gwt/issues/9542
[2] http://www.gwtproject.org/release-notes.html#Release_Notes_2_8_2
[3] http://www.gwtproject.org/release-notes.html#Release_Notes_2_8_1

Bug: Issue 7519
Change-Id: If6da895e1349336b8853767a537ed4a09c2773f5

lib/gwt/BUCK

@@ -1,11 +1,11 @@
 include_defs('//lib/maven.defs')
 
-VERSION = '2.8.0'
+VERSION = '2.8.2'
 
 maven_jar(
   name = 'user',
   id = 'com.google.gwt:gwt-user:' + VERSION,
-  sha1 = '518579870499e15531f454f35dca0772d7fa31f7',
+  sha1 = 'a2b9be2c996a658c4e009ba652a9c6a81c88a797',
   license = 'Apache2.0',
   attach_source = False,
 )
@@ -13,7 +13,7 @@ maven_jar(
 maven_jar(
   name = 'dev',
   id = 'com.google.gwt:gwt-dev:' + VERSION,
-  sha1 = 'f160a61272c5ebe805cd2d3d3256ed3ecf14893f',
+  sha1 = '7a87e060bbf129386b7ae772459fb9f87297c332',
   license = 'Apache2.0',
   attach_source = False,
 )
@@ -71,3 +71,12 @@ maven_jar(
   license = 'DO_NOT_DISTRIBUTE',
   visibility = ['PUBLIC'],
 )
+
+maven_jar(
+  name = 'jsr305',
+  id = 'com.google.code.findbugs:jsr305:3.0.1',
+  sha1 = 'f7be08ec23c21485b9b5a1cf1654c2ec8c58168d',
+  license = 'Apache2.0',
+  attach_source = False,
+  visibility = ['PUBLIC'],
+)

tools/gwt-constants.defs

@@ -20,6 +20,7 @@ GWT_TRANSITIVE_DEPS = [
   '//lib/gwt:javax-validation_src',
   '//lib/gwt:jsinterop-annotations',
   '//lib/gwt:jsinterop-annotations_src',
+  '//lib/gwt:jsr305',
   '//lib/gwt:tapestry',
   '//lib/gwt:w3c-css-sac',
   '//lib/ow2:ow2-asm',