Keep track of fixed positioning in accessibility tree.

content/shell/test_runner/web_ax_object_proxy.cc

Index: content/shell/test_runner/web_ax_object_proxy.cc
diff --git a/content/shell/test_runner/web_ax_object_proxy.cc b/content/shell/test_runner/web_ax_object_proxy.cc
index e9a49191218860385a7c246a9ad6342c3524c327..03ade01f59858b2253de37a0165a63445bb12b56 100644
--- a/content/shell/test_runner/web_ax_object_proxy.cc
+++ b/content/shell/test_runner/web_ax_object_proxy.cc
@@ -327,17 +327,20 @@ blink::WebFloatRect BoundsForObject(const blink::WebAXObject& object) {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  object.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  object.GetRelativeBounds(container, bounds, matrix, is_fixed_positioned);
   gfx::RectF computedBounds(0, 0, bounds.width, bounds.height);
   while (!container.IsDetached()) {
     computedBounds.Offset(bounds.x, bounds.y);
-    computedBounds.Offset(-container.GetScrollOffset().x,
-                          -container.GetScrollOffset().y);
+    if (!is_fixed_positioned) {
+      computedBounds.Offset(-container.GetScrollOffset().x,
+                            -container.GetScrollOffset().y);
+    }
     if (!matrix.isIdentity()) {
       gfx::Transform transform(matrix);
       transform.TransformRect(&computedBounds);
     }
-    container.GetRelativeBounds(container, bounds, matrix);
+    container.GetRelativeBounds(container, bounds, matrix, is_fixed_positioned);
   }
   return blink::WebFloatRect(computedBounds.x(), computedBounds.y(),
                              computedBounds.width(), computedBounds.height());
@@ -1810,7 +1813,9 @@ v8::Local<v8::Object> WebAXObjectProxy::OffsetContainer() {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  accessibility_object_.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  accessibility_object_.GetRelativeBounds(container, bounds, matrix,
+                                          is_fixed_positioned);
   return factory_->GetOrCreate(container);
 }
 
@@ -1819,7 +1824,9 @@ float WebAXObjectProxy::BoundsInContainerX() {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  accessibility_object_.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  accessibility_object_.GetRelativeBounds(container, bounds, matrix,
+                                          is_fixed_positioned);
   return bounds.x;
 }
 
@@ -1828,7 +1835,9 @@ float WebAXObjectProxy::BoundsInContainerY() {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  accessibility_object_.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  accessibility_object_.GetRelativeBounds(container, bounds, matrix,
+                                          is_fixed_positioned);
   return bounds.y;
 }
 
@@ -1837,7 +1846,9 @@ float WebAXObjectProxy::BoundsInContainerWidth() {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  accessibility_object_.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  accessibility_object_.GetRelativeBounds(container, bounds, matrix,
+                                          is_fixed_positioned);
   return bounds.width;
 }
 
@@ -1846,7 +1857,9 @@ float WebAXObjectProxy::BoundsInContainerHeight() {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  accessibility_object_.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  accessibility_object_.GetRelativeBounds(container, bounds, matrix,
+                                          is_fixed_positioned);
   return bounds.height;
 }
 
@@ -1856,7 +1869,9 @@ bool WebAXObjectProxy::HasNonIdentityTransform() {
   blink::WebAXObject container;
   blink::WebFloatRect bounds;
   SkMatrix44 matrix;
-  accessibility_object_.GetRelativeBounds(container, bounds, matrix);
+  bool is_fixed_positioned;
+  accessibility_object_.GetRelativeBounds(container, bounds, matrix,
+                                          is_fixed_positioned);
   return !matrix.isIdentity();
 }