Implemented explicit resizing from guestview.

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 8513644817c5e9004456b687bf0a6c2b779f8ea4..71e389569faaaae44348a9cf7a2a7f7200181958 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -598,7 +598,14 @@ void RenderWidgetHostImpl::WasResized() {
   // Skip if the |delegate_| has already been detached because
   // it's web contents is being deleted.
   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
-      !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
+      !renderer_initialized_ || !delegate_)
+    return;
+
+  // |old_resize_params_| needs to be cleared when autoresize is enabled,
+  // because the next time a regular resize occurs, it is not meaningful to
+  // compare its new size to the old size from before autoresizing.
+  if (auto_resize_enabled_) {
+    old_resize_params_.reset();

[Fady Samuel, 2015/01/12 23:13:56]

To land this, you're going to need to put it in a separate patch with a test.

[paulmeyer, 2015/01/12 23:25:19]

Acknowledged.

     return;
   }