[Blink] Don't center images in Android WebViews

third_party/WebKit/Source/core/html/ImageDocument.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 30 matching lines @@
 #include "core/html/HTMLContentElement.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/HTMLHeadElement.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLMetaElement.h"
 #include "core/layout/LayoutObject.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
+#include "core/page/Page.h"
 #include "platform/HostWindow.h"
 #include "wtf/text/StringBuilder.h"
 #include <limits>
 
 using namespace std;
 
 namespace {
 
 // The base square size is set to 10 because it rounds nicely for both the
 // minimum scale (0.1) and maximum scale (5.0).
@@ skipping 507 matching lines @@
     if (isStopped()) {
       m_imageElement = nullptr;
       return nullptr;
     }
   }
 
   return m_imageElement->cachedImage();
 }
 
 bool ImageDocument::shouldShrinkToFit() const {
-  return frame()->isMainFrame();
+  // WebView automatically resizes to match the contents, causing an infinite
+  // loop as the contents then resize to match the window. To prevent this,
+  // disallow images from shrinking to fit for WebViews.
+  bool isWrapContentWebView =
+      page() ? page()->settings().getForceZeroLayoutHeight() : false;
+  return frame()->isMainFrame() && !isWrapContentWebView;
 }
 
 DEFINE_TRACE(ImageDocument) {
   visitor->trace(m_divElement);
   visitor->trace(m_imageElement);
   HTMLDocument::trace(visitor);
 }
 
 // --------
 
@@ skipping 11 matching lines @@
 }
 
 bool ImageEventListener::operator==(const EventListener& listener) const {
   if (const ImageEventListener* imageEventListener =
           ImageEventListener::cast(&listener))
     return m_doc == imageEventListener->m_doc;
   return false;
 }
 
 }  // namespace blink