Switch to LayoutThemeMobile when emulating mobile device in DevTools.

third_party/WebKit/Source/web/DevToolsEmulator.cpp

 // Copyright 2015 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 "web/DevToolsEmulator.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
+#include "core/style/ComputedStyle.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "web/WebInputEventConversion.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebSettingsImpl.h"
 #include "web/WebViewImpl.h"
 
 namespace {
 
 static float calculateDeviceScaleAdjustment(int width, int height, float deviceScaleFactor)
@@ skipping 23 matching lines @@
 
 } // namespace
 
 namespace blink {
 
 DevToolsEmulator::DevToolsEmulator(WebViewImpl* webViewImpl)
     : m_webViewImpl(webViewImpl)
     , m_deviceMetricsEnabled(false)
     , m_emulateMobileEnabled(false)
     , m_isOverlayScrollbarsEnabled(false)
+    , m_isMobileLayoutThemeEnabled(false)
     , m_originalDefaultMinimumPageScaleFactor(0)
     , m_originalDefaultMaximumPageScaleFactor(0)
     , m_embedderTextAutosizingEnabled(webViewImpl->page()->settings().textAutosizingEnabled())
     , m_embedderDeviceScaleAdjustment(webViewImpl->page()->settings().deviceScaleAdjustment())
     , m_embedderPreferCompositingToLCDTextEnabled(webViewImpl->page()->settings().preferCompositingToLCDTextEnabled())
     , m_embedderUseMobileViewport(webViewImpl->page()->settings().useMobileViewportStyle())
     , m_embedderPluginsEnabled(webViewImpl->page()->settings().pluginsEnabled())
     , m_embedderAvailablePointerTypes(webViewImpl->page()->settings().availablePointerTypes())
     , m_embedderPrimaryPointerType(webViewImpl->page()->settings().primaryPointerType())
     , m_embedderAvailableHoverTypes(webViewImpl->page()->settings().availableHoverTypes())
@@ skipping 184 matching lines @@
     return m_deviceMetricsEnabled && m_emulateMobileEnabled;
 }
 
 void DevToolsEmulator::enableMobileEmulation()
 {
     if (m_emulateMobileEnabled)
         return;
     m_emulateMobileEnabled = true;
     m_isOverlayScrollbarsEnabled = RuntimeEnabledFeatures::overlayScrollbarsEnabled();
     RuntimeEnabledFeatures::setOverlayScrollbarsEnabled(true);
+    m_isMobileLayoutThemeEnabled = RuntimeEnabledFeatures::mobileLayoutThemeEnabled();
+    RuntimeEnabledFeatures::setMobileLayoutThemeEnabled(true);

[dgozman, 2016/02/11 18:53:44]

I was thinking about testing this, but didn't come up with anything good. I
wouldn't like to test differences in LayoutThemes in devtools emulation test.
And checking that enabling emulation toggles this switch sounds like a test for
the sake of nothing.

+    ComputedStyle::clearInitialStyle();
     m_webViewImpl->page()->settings().setUseMobileViewportStyle(true);
     m_webViewImpl->enableViewport();
     m_webViewImpl->settings()->setViewportMetaEnabled(true);
     m_webViewImpl->page()->frameHost().visualViewport().initializeScrollbars();
     m_webViewImpl->settings()->setShrinksViewportContentToFit(true);
     m_webViewImpl->page()->settings().setTextAutosizingEnabled(true);
     m_webViewImpl->page()->settings().setPreferCompositingToLCDTextEnabled(true);
     m_webViewImpl->page()->settings().setPluginsEnabled(false);
     m_webViewImpl->page()->settings().setAvailablePointerTypes(PointerTypeCoarse);
     m_webViewImpl->page()->settings().setPrimaryPointerType(PointerTypeCoarse);
     m_webViewImpl->page()->settings().setAvailableHoverTypes(HoverTypeOnDemand);
     m_webViewImpl->page()->settings().setPrimaryHoverType(HoverTypeOnDemand);
     m_webViewImpl->page()->settings().setResizeIsDeviceSizeChange(true);
     m_webViewImpl->setZoomFactorOverride(1);
 
     m_originalDefaultMinimumPageScaleFactor = m_webViewImpl->defaultMinimumPageScaleFactor();
     m_originalDefaultMaximumPageScaleFactor = m_webViewImpl->defaultMaximumPageScaleFactor();
     m_webViewImpl->setDefaultPageScaleLimits(0.25f, 5);
     // TODO(dgozman): mainFrameImpl() is null when it's remote. Figure out how
     // we end up with enabling emulation in this case.
     if (m_webViewImpl->mainFrameImpl())
         m_webViewImpl->mainFrameImpl()->frameView()->layout();
 }
 
 void DevToolsEmulator::disableMobileEmulation()
 {
     if (!m_emulateMobileEnabled)
         return;
     RuntimeEnabledFeatures::setOverlayScrollbarsEnabled(m_isOverlayScrollbarsEnabled);
+    RuntimeEnabledFeatures::setMobileLayoutThemeEnabled(m_isMobileLayoutThemeEnabled);
+    ComputedStyle::clearInitialStyle();
     m_webViewImpl->disableViewport();
     m_webViewImpl->settings()->setViewportMetaEnabled(false);
     m_webViewImpl->page()->frameHost().visualViewport().initializeScrollbars();
     m_webViewImpl->settings()->setShrinksViewportContentToFit(false);
     m_webViewImpl->page()->settings().setTextAutosizingEnabled(m_embedderTextAutosizingEnabled);
     m_webViewImpl->page()->settings().setPreferCompositingToLCDTextEnabled(m_embedderPreferCompositingToLCDTextEnabled);
     m_webViewImpl->page()->settings().setUseMobileViewportStyle(m_embedderUseMobileViewport);
     m_webViewImpl->page()->settings().setPluginsEnabled(m_embedderPluginsEnabled);
     m_webViewImpl->page()->settings().setAvailablePointerTypes(m_embedderAvailablePointerTypes);
     m_webViewImpl->page()->settings().setPrimaryPointerType(m_embedderPrimaryPointerType);
@@ skipping 73 matching lines @@
             m_lastPinchAnchorCss.clear();
             m_lastPinchAnchorDip.clear();
         }
         return true;
     }
 
     return false;
 }
 
 } // namespace blink