Rename AXObject to AXObjectImpl in modules/ and web/

docs/accessibility/overview.md

 # Accessibility Overview
 
 Accessibility means ensuring that all users, including users with disabilities,
 have equal access to software. One piece of this involves basic design
 principles such as using appropriate font sizes and color contrast,
 avoiding using color to convey important information, and providing keyboard
 alternatives for anything that is normally accomplished with a pointing device.
 However, when you see the word "accessibility" in a directory name in Chromium,
 that code's purpose is to provide full access to Chromium's UI via external
 accessibility APIs that are utilized by assistive technology.
@@ skipping 393 matching lines @@
 
 The node IDs for accessibility trees only need to be unique within a
 single frame. Where necessary, separate unique IDs are used within
 Chrome's main browser process. In Chromium accessibility, a "node ID"
 always means that ID that's only unique within a frame, and a "unique ID"
 means an ID that's globally unique.
 
 ## Blink
 
 Blink constructs an accessibility tree (a hierarchy of [WebAXObject]s) from the
-page it is rendering. WebAXObject is the public API wrapper around [AXObject],
-which is the core class of Blink's accessibility tree. AXObject is an abstract
+page it is rendering. WebAXObject is the public API wrapper around [AXObjectImpl],

[dmazzoni, 2017/05/05 05:18:46]

Please revert these changes

+which is the core class of Blink's accessibility tree. AXObjectImpl is an abstract
 class; the most commonly used concrete subclass of it is [AXNodeObject], which
 wraps a [Node]. In turn, most AXNodeObjects are actually [AXLayoutObject]s,
 which wrap both a [Node] and a [LayoutObject]. Access to the LayoutObject is
-important because some elements are only in the AXObject tree depending on their
+important because some elements are only in the AXObjectImpl tree depending on their
 visibility, geometry, linewrapping, and so on. There are some subclasses of
 AXLayoutObject that implement special-case logic for specific types of Node.
-There are also other subclasses of AXObject, which are mostly used for testing.
+There are also other subclasses of AXObjectImpl, which are mostly used for testing.
 
 Note that not all AXLayoutObjects correspond to actual Nodes; some are synthetic
 layout objects which group related inline elements or similar.
 
 The central class responsible for dealing with accessibility events in Blink is
 [AXObjectCacheImpl], which is responsible for caching the corresponding
 AXObjects for Nodes or LayoutObjects. This class has many methods named
 `handleFoo`, which are called throughout Blink to notify the AXObjectCacheImpl
 that it may need to update its tree. Since this class is already aware of all
 accessibility events in Blink, it is also responsible for relaying accessibility
@@ skipping 53 matching lines @@
 actions. This API is implemented in C++ by [AutomationInternalCustomBindings],
 which is renderer-side code, and in JavaScript by the [automation API]. The API
 is defined by [automation.idl], which must be kept synchronized with
 [ax_enums.idl].
 
 [AccessibilityHostMsg_EventParams]: https://cs.chromium.org/chromium/src/content/common/accessibility_messages.h?sq=package:chromium&l=75
 [AutomationInternalCustomBindings]: https://cs.chromium.org/chromium/src/chrome/renderer/extensions/automation_internal_custom_bindings.h
 [AXContentNodeData]: https://cs.chromium.org/chromium/src/content/common/ax_content_node_data.h
 [AXLayoutObject]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.h
 [AXNodeObject]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/accessibility/AXNodeObject.h
-[AXObject]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/accessibility/AXObject.h
+[AXObjectImpl]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/accessibility/AXObjectImpl.h

[dmazzoni, 2017/05/05 05:18:46]

This one is fine

 [AXObjectCacheImpl]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.h
 [AXPlatformNode]: https://cs.chromium.org/chromium/src/ui/accessibility/platform/ax_platform_node.h
 [AXTreeSerializer]: https://cs.chromium.org/chromium/src/ui/accessibility/ax_tree_serializer.h
 [BlinkAXTreeSource]: https://cs.chromium.org/chromium/src/content/renderer/accessibility/blink_ax_tree_source.h
 [BrowserAccessibility]: https://cs.chromium.org/chromium/src/content/browser/accessibility/browser_accessibility.h
 [BrowserAccessibilityDelegate]: https://cs.chromium.org/chromium/src/content/browser/accessibility/browser_accessibility_manager.h?sq=package:chromium&l=64
 [BrowserAccessibilityManager]: https://cs.chromium.org/chromium/src/content/browser/accessibility/browser_accessibility_manager.h
 [LayoutObject]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/layout/LayoutObject.h
 [NativeViewAccessibility]: https://cs.chromium.org/chromium/src/ui/views/accessibility/native_view_accessibility.h
 [Node]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/dom/Node.h
 [RenderAccessibilityImpl]: https://cs.chromium.org/chromium/src/content/renderer/accessibility/render_accessibility_impl.h
 [RenderFrameHostImpl]: https://cs.chromium.org/chromium/src/content/browser/frame_host/render_frame_host_impl.h
 [ui::AXNodeData]: https://cs.chromium.org/chromium/src/ui/accessibility/ax_node_data.h
 [WebAXObject]: https://cs.chromium.org/chromium/src/third_party/WebKit/public/web/WebAXObject.h
 [automation API]: https://cs.chromium.org/chromium/src/chrome/renderer/resources/extensions/automation
 [automation.idl]: https://cs.chromium.org/chromium/src/chrome/common/extensions/api/automation.idl
 [ax_enums.idl]: https://cs.chromium.org/chromium/src/ui/accessibility/ax_enums.idl
 [chrome.automation API]: https://developer.chrome.com/extensions/automation
 [webui-js]: https://cs.chromium.org/chromium/src/ui/webui/resources/js/cr/ui/