Make RenderObject::style() return a const object

Source/web/tests/WebDocumentTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "public/web/WebDocument.h"
 
 #include "core/CSSPropertyNames.h"
 #include "core/dom/NodeLayoutStyle.h"
@@ skipping 23 matching lines @@
 
     webDoc.insertStyleSheet("body { color: green }");
 
     // Check insertStyleSheet did not cause a synchronous style recalc.
     unsigned accessCount = coreDoc->styleEngine()->resolverAccessCount();
     ASSERT_EQ(0U, accessCount);
 
     HTMLElement* bodyElement = coreDoc->body();
     ASSERT(bodyElement);
 
-    LayoutStyle* style = bodyElement->layoutStyle();
+    const LayoutStyle* style = bodyElement->layoutStyle();
     ASSERT(style);
 
     // Inserted stylesheet not yet applied.
     ASSERT_EQ(Color(0, 0, 0), style->visitedDependentColor(CSSPropertyColor));
 
     // Apply inserted stylesheet.
     coreDoc->updateRenderTreeIfNeeded();
 
     style = bodyElement->layoutStyle();
     ASSERT(style);
@@ skipping 11 matching lines @@
     URLTestHelpers::registerMockedURLLoad(toKURL(baseURL + cssURL), WebString::fromUTF8(cssURL));
 
     WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(baseURL + htmlURL);
 
     WebFrame* frame = webViewHelper.webView()->mainFrame();
     Document* coreDoc = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->document();
     Element* transitionElement = coreDoc->getElementById("foo");
     ASSERT(transitionElement);
 
-    LayoutStyle* transitionStyle = transitionElement->layoutStyle();
+    const LayoutStyle* transitionStyle = transitionElement->layoutStyle();
     ASSERT(transitionStyle);
 
     HTMLElement* bodyElement = coreDoc->body();
     ASSERT(bodyElement);
 
-    LayoutStyle* bodyStyle = bodyElement->layoutStyle();
+    const LayoutStyle* bodyStyle = bodyElement->layoutStyle();
     ASSERT(bodyStyle);
     // The transition_exit.css stylesheet should not have been applied at this point.
     ASSERT_EQ(Color(0, 0, 0), bodyStyle->visitedDependentColor(CSSPropertyColor));
 
     frame->document().beginExitTransition("#foo", false);
 
     // Make sure the stylesheet load request gets processed.
     FrameTestHelpers::pumpPendingRequestsDoNotUse(frame);
     coreDoc->updateRenderTreeIfNeeded();
 
@@ skipping 18 matching lines @@
     URLTestHelpers::registerMockedURLLoad(toKURL(baseURL + cssURL), WebString::fromUTF8(cssURL));
 
     WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(baseURL + htmlURL);
 
     WebFrame* frame = webViewHelper.webView()->mainFrame();
     Document* coreDoc = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->document();
     Element* transitionElement = coreDoc->getElementById("foo");
     ASSERT(transitionElement);
 
-    LayoutStyle* transitionStyle = transitionElement->layoutStyle();
+    const LayoutStyle* transitionStyle = transitionElement->layoutStyle();
     ASSERT(transitionStyle);
 
     HTMLElement* bodyElement = coreDoc->body();
     ASSERT(bodyElement);
 
-    LayoutStyle* bodyStyle = bodyElement->layoutStyle();
+    const LayoutStyle* bodyStyle = bodyElement->layoutStyle();
     ASSERT(bodyStyle);
     // The transition_exit.css stylesheet should not have been applied at this point.
     ASSERT_EQ(Color(0, 0, 0), bodyStyle->visitedDependentColor(CSSPropertyColor));
 
     frame->document().beginExitTransition("#foo", true);
 
     // Make sure the stylesheet load request gets processed.
     FrameTestHelpers::pumpPendingRequestsDoNotUse(frame);
     coreDoc->updateRenderTreeIfNeeded();
 
@@ skipping 16 matching lines @@
     URLTestHelpers::registerMockedURLLoad(toKURL(baseURL + htmlURL), WebString::fromUTF8(htmlURL));
 
     WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(baseURL + htmlURL);
 
     WebFrame* frame = webViewHelper.webView()->mainFrame();
     Document* coreDoc = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->document();
     Element* transitionElement = coreDoc->getElementById("foo");
     ASSERT(transitionElement);
 
-    LayoutStyle* transitionStyle = transitionElement->layoutStyle();
+    const LayoutStyle* transitionStyle = transitionElement->layoutStyle();
     ASSERT(transitionStyle);
     EXPECT_EQ(transitionStyle->opacity(), 1);
 
     // Hide transition elements
     frame->document().hideTransitionElements("#foo");
     FrameTestHelpers::pumpPendingRequestsDoNotUse(frame);
     coreDoc->updateRenderTreeIfNeeded();
     transitionStyle = transitionElement->layoutStyle();
     ASSERT_TRUE(transitionStyle);
     EXPECT_EQ(transitionStyle->opacity(), 0);
@@ skipping 25 matching lines @@
     ASSERT_FALSE(coreDoc->isTransitionDocument());
 
     frame->document().setIsTransitionDocument(true);
     ASSERT_TRUE(coreDoc->isTransitionDocument());
 
     frame->document().setIsTransitionDocument(false);
     ASSERT_FALSE(coreDoc->isTransitionDocument());
 }
 
 }