Revert of Migrate BrowserAccessibility windows unique id handling to AXPlatformNodeWin.

content/browser/accessibility/browser_accessibility_android.cc

Index: content/browser/accessibility/browser_accessibility_android.cc
diff --git a/content/browser/accessibility/browser_accessibility_android.cc b/content/browser/accessibility/browser_accessibility_android.cc
index e51f201559433aad9266362954c3ce0fcc68490a..66c5910cc35882a23db5a80550dd88640ea702ca 100644
--- a/content/browser/accessibility/browser_accessibility_android.cc
+++ b/content/browser/accessibility/browser_accessibility_android.cc
@@ -4,9 +4,7 @@
 
 #include "content/browser/accessibility/browser_accessibility_android.h"
 
-#include "base/containers/hash_tables.h"
 #include "base/i18n/break_iterator.h"
-#include "base/lazy_instance.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ -18,7 +16,6 @@
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/accessibility/ax_role_properties.h"
 #include "ui/accessibility/platform/ax_android_constants.h"
-#include "ui/accessibility/platform/ax_platform_unique_id.h"
 #include "ui/accessibility/platform/ax_snapshot_node_android_platform.h"
 
 namespace aria_strings {
@@ -65,31 +62,8 @@
   return new BrowserAccessibilityAndroid();
 }
 
-using UniqueIdMap = base::hash_map<int32_t, BrowserAccessibilityAndroid*>;
-// Map from each AXPlatformNode's unique id to its instance.
-base::LazyInstance<UniqueIdMap>::DestructorAtExit g_unique_id_map =
-    LAZY_INSTANCE_INITIALIZER;
-
-// static
-BrowserAccessibilityAndroid* BrowserAccessibilityAndroid::GetFromUniqueId(
-    int32_t unique_id) {
-  UniqueIdMap* unique_ids = g_unique_id_map.Pointer();
-  auto iter = unique_ids->find(unique_id);
-  if (iter != unique_ids->end())
-    return iter->second;
-
-  return nullptr;
-}
-
-BrowserAccessibilityAndroid::BrowserAccessibilityAndroid()
-    : unique_id_(ui::GetNextAXPlatformNodeUniqueId()) {
-  g_unique_id_map.Get()[unique_id_] = this;
+BrowserAccessibilityAndroid::BrowserAccessibilityAndroid() {
   first_time_ = true;
-}
-
-BrowserAccessibilityAndroid::~BrowserAccessibilityAndroid() {
-  if (unique_id_)
-    g_unique_id_map.Get().erase(unique_id_);
 }
 
 bool BrowserAccessibilityAndroid::IsNative() const {