Plumb smooth scrolling in Chromium compositor

content/browser/web_contents/web_contents_android.cc

Index: content/browser/web_contents/web_contents_android.cc
diff --git a/content/browser/web_contents/web_contents_android.cc b/content/browser/web_contents/web_contents_android.cc
index 8fd5c506a2dfb263920e9538108c22af5985d837..17e0204f776f0bc5222a8e3eafeec05a07bd8519 100644
--- a/content/browser/web_contents/web_contents_android.cc
+++ b/content/browser/web_contents/web_contents_android.cc
@@ -393,6 +393,23 @@ void WebContentsAndroid::ScrollFocusedEditableNodeIntoView(
       host->GetRoutingID(), gfx::Rect()));
 }
 
+void WebContentsAndroid::SmoothScroll(JNIEnv* env,
+                                      jobject obj,
+                                      jint targetX,
+                                      jint targetY,

[jdduke (slow), 2015/07/27 17:15:38]

Nit: target_x,target_y,duration_ms

[hush (inactive), 2015/07/28 00:10:43]

Done.

+                                      jlong durationMs) {
+  RenderViewHost* host = web_contents_->GetRenderViewHost();
+  if (!host)
+    return;
+
+  ContentViewCoreImpl* contentViewCore =
+      ContentViewCoreImpl::FromWebContents(web_contents_);
+  float scale_factor = contentViewCore->GetScaleFactor();
+  host->Send(new InputMsg_SmoothScroll(host->GetRoutingID(),
+                                       targetX / scale_factor,
+                                       targetY / scale_factor, durationMs));
+}
+
 void WebContentsAndroid::SelectWordAroundCaret(JNIEnv* env, jobject obj) {
   RenderViewHost* host = web_contents_->GetRenderViewHost();
   if (!host)