[android_webview] Use auto-sizing for webviews in wrap content mode.

android_webview/renderer/aw_render_view_ext.cc

Index: android_webview/renderer/aw_render_view_ext.cc
diff --git a/android_webview/renderer/aw_render_view_ext.cc b/android_webview/renderer/aw_render_view_ext.cc
index 14cbb17a9a880b876a4af24abb469dd613fd04cc..e418f2ff676a379305b92f088dd227405a2312f0 100644
--- a/android_webview/renderer/aw_render_view_ext.cc
+++ b/android_webview/renderer/aw_render_view_ext.cc
@@ -4,6 +4,7 @@
 
 #include "android_webview/renderer/aw_render_view_ext.h"
 
+#include <limits>
 #include <string>
 
 #include "android_webview/common/aw_hit_test_data.h"
@@ -164,6 +165,7 @@ bool AwRenderViewExt::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(AwViewMsg_ResetScrollAndScaleState,
                         OnResetScrollAndScaleState)
     IPC_MESSAGE_HANDLER(AwViewMsg_SetInitialPageScale, OnSetInitialPageScale)
+    IPC_MESSAGE_HANDLER(AwViewMsg_SetAutoResizeMode, OnSetAutoResizeMode)
     IPC_MESSAGE_HANDLER(AwViewMsg_SetBackgroundColor, OnSetBackgroundColor)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
@@ -304,6 +306,18 @@ void AwRenderViewExt::OnSetInitialPageScale(double page_scale_factor) {
       page_scale_factor);
 }
 
+void AwRenderViewExt::OnSetAutoResizeMode(bool enable, int width) {
+  if (!render_view() || !render_view()->GetWebView())
+    return;
+  render_view()->GetWebView()->setForceFixedLayoutSizeToEqualSize(enable);
+  if (enable) {
+    render_view()->GetWebView()->enableAutoResizeMode(
+        gfx::Size(width, 0), gfx::Size(width, std::numeric_limits<int>::max()));
+  } else {
+    render_view()->GetWebView()->disableAutoResizeMode();
+  }
+}
+
 void AwRenderViewExt::OnSetBackgroundColor(SkColor c) {
   if (!render_view() || !render_view()->GetWebView())
     return;