Fix date picker datalist suggestion dropdown size with use-zoom-for-dsf.

When a date picker has a suggestion list it's supposed to be the same
width as the input element. With use-zoom-for-dsf on I discovered that
it was too wide because the width that was being passed in was using
"root frame" coords that were not scaled correctly.

BUG=621221

Review-Url: https://codereview.chromium.org/2095113002
Cr-Commit-Position: refs/heads/master@{#403394}

third_party/WebKit/LayoutTests/TestExpectations

@@ -284,6 +284,8 @@ crbug.com/487281 [ Mac ] fast/forms/select/menulist-narrow-width.html [ Failure
 
 crbug.com/543110 [ Mac ] fast/text/international/text-shaping-arabic.html [ Failure ]
 
+crbug.com/621221 [ Win Linux ] virtual/scalefactor200withzoom/fast/hidpi/static/data-suggestion-picker-appearance.html [ NeedsRebaseline ]
+
 crbug.com/548904 [ Linux Win ] fast/writing-mode/Kusa-Makura-background-canvas.html [ Failure Pass ]
 
 crbug.com/552433 [ Win7 Debug ] svg/W3C-SVG-1.1/coords-units-02-b.svg [ Failure ]

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

@@ -1836,7 +1836,6 @@ bool HTMLInputElement::setupDateTimeChooserParameters(DateTimeChooserParameters&
         parameters.stepBase = 0;
     }
 
-    parameters.anchorRectInRootFrame = document().view()->contentsToRootFrame(pixelSnappedBoundingBox());
     parameters.anchorRectInScreen = document().view()->contentsToScreen(pixelSnappedBoundingBox());
     parameters.currentValue = value();
     parameters.doubleValue = m_inputType->valueAsDouble();

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

@@ -5,9 +5,13 @@
 #include "core/html/HTMLInputElement.h"
 
 #include "core/dom/Document.h"
+#include "core/frame/FrameHost.h"
+#include "core/frame/FrameView.h"
+#include "core/frame/VisualViewport.h"
 #include "core/html/HTMLBodyElement.h"
 #include "core/html/HTMLFormElement.h"
 #include "core/html/HTMLHtmlElement.h"
+#include "core/html/forms/DateTimeChooser.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <memory>
@@ -84,4 +88,20 @@ TEST(HTMLInputElementTest, ImageTypeCrash)
     input->setAttribute(HTMLNames::valueAttr, "aaa");
 }
 
+TEST(HTMLInputElementTest, DateTimeChooserSizeParamRespectsScale)
+{
+    std::unique_ptr<DummyPageHolder> pageHolder = DummyPageHolder::create();
+    Document* document = &(pageHolder->document());
+    document->view()->frame().host()->visualViewport().setScale(2.f);
+    document->body()->setInnerHTML("<input type='date' style='width:200px;height:50px' />", ASSERT_NO_EXCEPTION);
+    document->view()->updateAllLifecyclePhases();
+    HTMLInputElement* input = toHTMLInputElement(document->body()->firstChild());
+
+    DateTimeChooserParameters params;
+    bool success = input->setupDateTimeChooserParameters(params);
+    EXPECT_TRUE(success);
+    EXPECT_EQ("date", params.type);
+    EXPECT_EQ(IntRect(16, 16, 400, 100), params.anchorRectInScreen);
+}
+
 } // namespace blink

third_party/WebKit/Source/core/html/forms/DateTimeChooser.h

@@ -51,7 +51,6 @@ struct DateTimeSuggestion {
 struct DateTimeChooserParameters {
     DISALLOW_NEW();
     AtomicString type;
-    IntRect anchorRectInRootFrame;
     IntRect anchorRectInScreen;
     // Locale name for which the chooser should be localized. This
     // might be an invalid name because it comes from HTML lang

third_party/WebKit/Source/web/DateTimeChooserImpl.cpp

@@ -161,7 +161,7 @@ void DateTimeChooserImpl::writeDocument(SharedBuffer* data)
         addProperty("suggestionValues", suggestionValues, data);
         addProperty("localizedSuggestionValues", localizedSuggestionValues, data);
         addProperty("suggestionLabels", suggestionLabels, data);
-        addProperty("inputWidth", static_cast<unsigned>(m_parameters.anchorRectInRootFrame.width()), data);
+        addProperty("inputWidth", static_cast<unsigned>(m_parameters.anchorRectInScreen.width()), data);
         addProperty("showOtherDateEntry", LayoutTheme::theme().supportsCalendarPicker(m_parameters.type), data);
         addProperty("otherDateLabel", otherDateLabelString, data);
         addProperty("suggestionHighlightColor", LayoutTheme::theme().activeListBoxSelectionBackgroundColor().serialized(), data);