Implement accessible scroll actions on Android.

Previously we only exposed scroll information for the main frame, now
we expose scroll information and support scrolling actions on all
scrollable objects.

Depends on: https://codereview.chromium.org/1121473004/

BUG=483653

Review URL: https://codereview.chromium.org/1136523007

Cr-Commit-Position: refs/heads/master@{#335299}

1 files changed, 24 insertions, 0 deletions

diff --git a/content/browser/accessibility/browser_accessibility_manager_android.cc b/content/browser/accessibility/browser_accessibility_manager_android.cc
index 79f2b1c..703d800 100644
--- a/content/browser/accessibility/browser_accessibility_manager_android.cc
+++ b/content/browser/accessibility/browser_accessibility_manager_android.cc
@@ -269,6 +269,10 @@ jboolean BrowserAccessibilityManagerAndroid::PopulateAccessibilityNodeInfo(
       id,
       node->CanScrollForward(),
       node->CanScrollBackward(),
+      node->CanScrollUp(),
+      node->CanScrollDown(),
+      node->CanScrollLeft(),
+      node->CanScrollRight(),
       node->IsClickable(),
       node->IsEditableText(),
       node->IsEnabled(),
@@ -735,6 +739,26 @@ void BrowserAccessibilityManagerAndroid::SetAccessibilityFocus(
     delegate_->AccessibilitySetAccessibilityFocus(id);
 }
 
+bool BrowserAccessibilityManagerAndroid::IsSlider(
+    JNIEnv* env, jobject obj, jint id) {
+  BrowserAccessibilityAndroid* node = static_cast<BrowserAccessibilityAndroid*>(
+      GetFromID(id));
+  if (!node)
+    return false;
+
+  return node->GetRole() == ui::AX_ROLE_SLIDER;
+}
+
+bool BrowserAccessibilityManagerAndroid::Scroll(
+    JNIEnv* env, jobject obj, jint id, int direction) {
+  BrowserAccessibilityAndroid* node = static_cast<BrowserAccessibilityAndroid*>(
+      GetFromID(id));
+  if (!node)
+    return false;
+
+  return node->Scroll(direction);
+}
+
 void BrowserAccessibilityManagerAndroid::OnAtomicUpdateFinished(
     ui::AXTree* tree,
     bool root_changed,