implement error state for translate infobar

- this cl implements the UI on Windows and the partial backend of IPC messaging to include error type 
  - implement error state
    - add translate error types
    - use a structure as details for IPC messaging between render view and browser so as to include error type (was using std::pair)
    - translate delegate handles error state and provides mapping to error messages
    - infobar handles visual error states
    - modify background painting to handle normal and error backgrounds, and animation of cross-fading between the 2 backgrounds
  - infobar now stores state (and translation_pending flag) that it's currently displaying to user, instead of just relying on TransateInfoBarDelegate's
    - if infobar receives PAGE_TRANSLAED notification before delegate does (possible because order is not fixed), delegate's state won't be updated to be used by infobar.
    - after all the observers have received the notification, both infobar and delegate will end up with matching states, so there's no worries of out-of-sync.
  - update unittests accordingly
  - update mac and linux code accordingly to make build pass
- jay will implement the remaining backend to pass actual translate error types to the IPC message (tracked by bug 37778)

BUG=38548
TEST=none yet, until bug 37778 is also fixed.

Review URL: http://codereview.chromium.org/1321003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@42953 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 36 insertions, 4 deletions

diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 8274846..808f668 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -26,6 +26,7 @@
 #include "chrome/common/page_transition_types.h"
 #include "chrome/common/renderer_preferences.h"
 #include "chrome/common/resource_response.h"
+#include "chrome/common/translate_errors.h"
 #include "chrome/common/view_types.h"
 #include "chrome/common/webkit_param_traits.h"
 #include "gfx/native_widget_types.h"
@@ -2660,6 +2661,11 @@ struct ParamTraits<ViewHostMsg_TranslateTextParam> {
   }
 };
 
+template <>
+struct SimilarTypeTraits<TranslateErrors::Type> {
+  typedef int Type;
+};
+
 }  // namespace IPC
 
 
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index c06da08..94f2fcb 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -23,6 +23,7 @@
 #include "chrome/common/nacl_types.h"
 #include "chrome/common/notification_type.h"
 #include "chrome/common/page_zoom.h"
+#include "chrome/common/translate_errors.h"
 #include "gfx/rect.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message.h"
@@ -2162,10 +2163,11 @@ IPC_BEGIN_MESSAGES(ViewHost)
                       std::string /* the language */)
 
   // Notifies the browser that a page has been translated.
-  IPC_MESSAGE_ROUTED3(ViewHostMsg_PageTranslated,
-                      int,        /* page id */
-                      std::string /* the original language */,
-                      std::string /* the translated language */)
+  IPC_MESSAGE_ROUTED4(ViewHostMsg_PageTranslated,
+                      int,                  /* page id */
+                      std::string           /* the original language */,
+                      std::string           /* the translated language */,
+                      TranslateErrors::Type /* the error type if available */)
 
   //---------------------------------------------------------------------------
   // Socket Stream messages:
diff --git a/chrome/common/translate_errors.h b/chrome/common/translate_errors.h
new file mode 100644
index 0000000..de2e3bd
--- /dev/null
+++ b/chrome/common/translate_errors.h
@@ -0,0 +1,24 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_COMMON_TRANSLATE_ERRORS_H_
+#define CHROME_COMMON_TRANSLATE_ERRORS_H_
+
+// This file consolidates all the error types for translation of a page.
+
+class TranslateErrors {
+ public:
+  enum Type {
+    NONE = 0,
+    NETWORK = 1,
+    SERVER,
+  };
+
+ private:
+  TranslateErrors() {}
+
+  DISALLOW_COPY_AND_ASSIGN(TranslateErrors);
+};
+
+#endif  // CHROME_COMMON_TRANSLATE_ERRORS_H_