Invalidate the text autosizer on meta viewport settings changes

third_party/WebKit/Source/core/layout/TextAutosizerTest.cpp

Index: third_party/WebKit/Source/core/layout/TextAutosizerTest.cpp
diff --git a/third_party/WebKit/Source/core/layout/TextAutosizerTest.cpp b/third_party/WebKit/Source/core/layout/TextAutosizerTest.cpp
index c61b38a8a20fb16b8bd37275d059fc1e4b83dbd8..739591ee163894e120fd9e158d17893db0ba0293 100644
--- a/third_party/WebKit/Source/core/layout/TextAutosizerTest.cpp
+++ b/third_party/WebKit/Source/core/layout/TextAutosizerTest.cpp
@@ -384,15 +384,12 @@ TEST_F(TextAutosizerTest, DeviceScaleAdjustmentWithViewport)
     EXPECT_FLOAT_EQ(40.f, autosized->layoutObject()->style()->computedFontSize());
 
     document().settings()->setViewportMetaEnabled(false);
-    // TODO(pdr): This should not be needed but changing viewport settings does
-    // not invalidate TextAutosizing, see ViewportDescriptionChange in Page.cpp.
-    document().settings()->setDeviceScaleAdjustment(2.0f);
     document().view()->updateAllLifecyclePhases();
 
     autosized = document().getElementById("autosized");
     EXPECT_FLOAT_EQ(16.f, autosized->layoutObject()->style()->specifiedFontSize());
-    // (device scale adjustment = 2) * (specified font-size = 16px) * (viewport width = 800px) / (window width = 320px) = 80px.
-    EXPECT_FLOAT_EQ(80.f, autosized->layoutObject()->style()->computedFontSize());
+    // (device scale adjustment = 1.5) * (specified font-size = 16px) * (viewport width = 800px) / (window width = 320px) = 60px.
+    EXPECT_FLOAT_EQ(60.f, autosized->layoutObject()->style()->computedFontSize());
 }
 
 } // namespace blink