Use relative bounding boxes throughout Chrome accessibility

content/common/accessibility_messages.h

Index: content/common/accessibility_messages.h
diff --git a/content/common/accessibility_messages.h b/content/common/accessibility_messages.h
index 74ff296673d5a77d947ab6b0201db9868c8e8e08..13697fd60c0553da93971aa0a91fda1fbb88aed7 100644
--- a/content/common/accessibility_messages.h
+++ b/content/common/accessibility_messages.h
@@ -14,6 +14,7 @@
 #include "ipc/param_traits_macros.h"
 #include "third_party/WebKit/public/web/WebAXEnums.h"
 #include "ui/accessibility/ax_node_data.h"
+#include "ui/accessibility/ax_relative_bounds.h"
 #include "ui/accessibility/ax_tree_update.h"
 #include "ui/gfx/transform.h"
 
@@ -39,6 +40,7 @@ IPC_STRUCT_TRAITS_BEGIN(content::AXContentNodeData)
   IPC_STRUCT_TRAITS_MEMBER(html_attributes)
   IPC_STRUCT_TRAITS_MEMBER(child_ids)
   IPC_STRUCT_TRAITS_MEMBER(content_int_attributes)
+  IPC_STRUCT_TRAITS_MEMBER(offset_container_id)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::AXContentTreeData)
@@ -70,6 +72,12 @@ IPC_STRUCT_TRAITS_BEGIN(content::AXContentTreeUpdate)
   IPC_STRUCT_TRAITS_MEMBER(nodes)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(ui::AXRelativeBounds)
+  IPC_STRUCT_TRAITS_MEMBER(offset_container_id)
+  IPC_STRUCT_TRAITS_MEMBER(bounds)
+  IPC_STRUCT_TRAITS_MEMBER(transform)
+IPC_STRUCT_TRAITS_END()
+
 IPC_STRUCT_BEGIN(AccessibilityHostMsg_EventParams)
   // The tree update.
   IPC_STRUCT_MEMBER(content::AXContentTreeUpdate, update)
@@ -85,9 +93,8 @@ IPC_STRUCT_BEGIN(AccessibilityHostMsg_LocationChangeParams)
   // ID of the object whose location is changing.
   IPC_STRUCT_MEMBER(int, id)
 
-  // The object's new location, in frame-relative coordinates (same
-  // as the coordinates in AccessibilityNodeData).
-  IPC_STRUCT_MEMBER(gfx::RectF, new_location)
+  // The object's new location info.
+  IPC_STRUCT_MEMBER(ui::AXRelativeBounds, new_location)
 IPC_STRUCT_END()
 
 IPC_STRUCT_BEGIN(AccessibilityHostMsg_FindInPageResultParams)