Add autoresize capability to chromium.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 955c5f86ba4292e4b75cfb6661c29e5ff12caee5..b0aac9e20bce07a8b3a2b62c63c1c90b1da5e619 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -651,6 +651,7 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ViewMsg_SetBackground, OnSetBackground)
     IPC_MESSAGE_HANDLER(ViewMsg_EnablePreferredSizeChangedMode,
                         OnEnablePreferredSizeChangedMode)
+    IPC_MESSAGE_HANDLER(ViewMsg_EnableAutoResize, OnEnableAutoResize)
     IPC_MESSAGE_HANDLER(ViewMsg_DisableScrollbarsForSmallWindows,
                         OnDisableScrollbarsForSmallWindows)
     IPC_MESSAGE_HANDLER(ViewMsg_SetRendererPrefs, OnSetRendererPrefs)
@@ -1743,6 +1744,25 @@ void RenderViewImpl::focusedNodeChanged(const WebNode& node) {
   FOR_EACH_OBSERVER(RenderViewObserver, observers_, FocusedNodeChanged(node));
 }
 
+void RenderViewImpl::autoSizeChanged(const WebSize& new_size) {
+  Send(new ViewHostMsg_DidContentsPreferredSizeChange(routing_id_,

[darin (slow to review), 2011/11/28 16:53:55]

nit: DidChangeContentsPreferredSize or ContentsPreferredSizeChanged

DidContentsPreferredSizeChange sounds like it is asking a question, but that
isn't a question the browser process can answer.

[jennb, 2011/11/28 18:02:24]

Maybe move the verb right after Did, i.e. DidChangeContentsPreferredSize?

[levin, 2011/11/28 18:44:56]

I was re-using an existing message (which I think follows a pattern of
"ViewHostMsg_Did*" to indicate an event) but I can see how the name may be
confusing. I will create a new message for my case since the view host may want
to handle it differently.

+                                                      new_size));
+}
+
+void RenderViewImpl::didUpdateLayout() {
+  // We don't always want to set up a timer, only if we've been put in that
+  // mode by getting a |ViewMsg_EnablePreferredSizeChangedMode|
+  // message.
+  if (!send_preferred_size_changes_ || !webview())
+    return;
+
+  if (check_preferred_size_timer_.IsRunning())
+    return;
+  check_preferred_size_timer_.Start(FROM_HERE,
+                                    TimeDelta::FromMilliseconds(0), this,
+                                    &RenderViewImpl::CheckPreferredSize);
+}
+
 void RenderViewImpl::navigateBackForwardSoon(int offset) {
   Send(new ViewHostMsg_GoToEntryAtOffset(routing_id_, offset));
 }
@@ -2851,20 +2871,6 @@ void RenderViewImpl::willReleaseScriptContext(WebFrame* frame,
       frame, context, world_id);
 }
 
-void RenderViewImpl::didUpdateLayout(WebFrame* frame) {
-  // We don't always want to set up a timer, only if we've been put in that
-  // mode by getting a |ViewMsg_EnablePreferredSizeChangedMode|
-  // message.
-  if (!send_preferred_size_changes_ || !webview())
-    return;
-
-  if (check_preferred_size_timer_.IsRunning())
-    return;
-  check_preferred_size_timer_.Start(FROM_HERE,
-                                    TimeDelta::FromMilliseconds(0), this,
-                                    &RenderViewImpl::CheckPreferredSize);
-}
-
 void RenderViewImpl::CheckPreferredSize() {
   // We don't always want to send the change messages over IPC, only if we've
   // been put in that mode by getting a |ViewMsg_EnablePreferredSizeChangedMode|
@@ -3820,6 +3826,15 @@ void RenderViewImpl::OnFileChooserResponse(const std::vector<FilePath>& paths) {
   }
 }
 
+void RenderViewImpl::OnEnableAutoResize(const gfx::Size& min_size,
+                                        const gfx::Size& max_size) {
+  DCHECK(!send_preferred_size_changes_);
+  DCHECK(disable_scrollbars_size_limit_.IsEmpty());
+  if (!webview())
+    return;
+  webview()->enableAutoSizeMode(true, min_size, max_size);
+}
+
 void RenderViewImpl::OnEnablePreferredSizeChangedMode() {
   if (send_preferred_size_changes_)
     return;
@@ -3828,7 +3843,7 @@ void RenderViewImpl::OnEnablePreferredSizeChangedMode() {
   // Start off with an initial preferred size notification (in case
   // |didUpdateLayout| was already called).
   if (webview())
-    didUpdateLayout(webview()->mainFrame());
+    didUpdateLayout();
 }
 
 void RenderViewImpl::OnDisableScrollbarsForSmallWindows(