Toggle GPU raster heuristics based on viewportEnabled.

third_party/WebKit/Source/web/tests/ViewportTest.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2774 matching lines @@
 }
 
 TEST_F(ViewportTest, viewportTriggersGpuRasterization)
 {
     FrameTestHelpers::WebViewHelper webViewHelper;
 
     registerMockedHttpURLLoad("viewport/viewport-gpu-rasterization-disabled-without-viewport.html");
     webViewHelper.initializeAndLoad(m_baseURL + "viewport/viewport-gpu-rasterization-disabled-without-viewport.html", true, nullptr, nullptr, nullptr, setViewportSettings);
     webViewHelper.webView()->resize(WebSize(640, 480));
     EXPECT_FALSE(webViewHelper.webView()->matchesHeuristicsForGpuRasterizationForTesting());
+    // Also test that setting enableViewport to false (as on desktop Chrome)
+    // supports GPU raster unconditionally.
+    webViewHelper.initializeAndLoad(m_baseURL + "viewport/viewport-gpu-rasterization-disabled-without-viewport.html", true);
+    webViewHelper.webView()->resize(WebSize(640, 480));
+    EXPECT_TRUE(webViewHelper.webView()->matchesHeuristicsForGpuRasterizationForTesting());
 
     registerMockedHttpURLLoad("viewport/viewport-gpu-rasterization.html");
     webViewHelper.initializeAndLoad(m_baseURL + "viewport/viewport-gpu-rasterization.html", true, nullptr, nullptr, nullptr, setViewportSettings);
     webViewHelper.webView()->resize(WebSize(640, 480));
     EXPECT_TRUE(webViewHelper.webView()->matchesHeuristicsForGpuRasterizationForTesting());
 
     registerMockedHttpURLLoad("viewport/viewport-gpu-rasterization-expanded-heuristics.html");
     webViewHelper.initializeAndLoad(m_baseURL + "viewport/viewport-gpu-rasterization-expanded-heuristics.html", true, nullptr, nullptr, nullptr, setViewportSettings);
     webViewHelper.webView()->resize(WebSize(640, 480));
     EXPECT_TRUE(webViewHelper.webView()->matchesHeuristicsForGpuRasterizationForTesting());
@@ skipping 206 matching lines @@
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + "viewport/viewport-warnings-7.html", true, &webFrameClient, nullptr, nullptr, setViewportSettings);
 
     Page* page = webViewHelper.webView()->page();
     runViewportTest(page, 320, 352);
 
     EXPECT_EQ(0U, webFrameClient.messages.size());
 }
 
 } // namespace blink