DevTools: explicitly control support for viewport meta tag so that desktop emulation was possible

Source/core/inspector/InspectorPageAgent.cpp

Index: Source/core/inspector/InspectorPageAgent.cpp
diff --git a/Source/core/inspector/InspectorPageAgent.cpp b/Source/core/inspector/InspectorPageAgent.cpp
index 466def4eaa09861f4c88e7b615c1f5dbe6103edf..91b3a84e3452ca479a887e7f5b8f0860c957828e 100644
--- a/Source/core/inspector/InspectorPageAgent.cpp
+++ b/Source/core/inspector/InspectorPageAgent.cpp
@@ -87,6 +87,7 @@ static const char pageAgentScriptsToEvaluateOnLoad[] = "pageAgentScriptsToEvalua
 static const char pageAgentScreenWidthOverride[] = "pageAgentScreenWidthOverride";
 static const char pageAgentScreenHeightOverride[] = "pageAgentScreenHeightOverride";
 static const char pageAgentDeviceScaleFactorOverride[] = "pageAgentDeviceScaleFactorOverride";
+static const char pageAgentEmulateViewport[] = "pageAgentEmulateViewport";
 static const char pageAgentFitWindow[] = "pageAgentFitWindow";
 static const char textAutosizingFontScaleFactorOverride[] = "textAutosizingFontScaleFactorOverride";
 static const char pageAgentShowFPSCounter[] = "pageAgentShowFPSCounter";
@@ -365,8 +366,9 @@ void InspectorPageAgent::restore()
         int currentWidth = static_cast<int>(m_state->getLong(PageAgentState::pageAgentScreenWidthOverride));
         int currentHeight = static_cast<int>(m_state->getLong(PageAgentState::pageAgentScreenHeightOverride));
         double currentDeviceScaleFactor = m_state->getDouble(PageAgentState::pageAgentDeviceScaleFactorOverride);
+        bool currentEmulateViewport = m_state->getBoolean(PageAgentState::pageAgentEmulateViewport);
         bool currentFitWindow = m_state->getBoolean(PageAgentState::pageAgentFitWindow);
-        updateViewMetrics(currentWidth, currentHeight, currentDeviceScaleFactor, currentFitWindow);
+        updateViewMetrics(currentWidth, currentHeight, currentDeviceScaleFactor, currentEmulateViewport, currentFitWindow);
         updateTouchEventEmulationInPage(m_state->getBoolean(PageAgentState::touchEventEmulationEnabled));
     }
 }
@@ -403,14 +405,15 @@ void InspectorPageAgent::disable(ErrorString*)
     if (m_didForceCompositingMode)
         setForceCompositingMode(0, false);
 
-    if (!deviceMetricsChanged(0, 0, 1, false, 1, false))
+    if (!deviceMetricsChanged(0, 0, 1, false, false, 1, false))
         return;
 
     // When disabling the agent, reset the override values if necessary.
-    updateViewMetrics(0, 0, 1, false);
+    updateViewMetrics(0, 0, 1, false, false);
     m_state->setLong(PageAgentState::pageAgentScreenWidthOverride, 0);
     m_state->setLong(PageAgentState::pageAgentScreenHeightOverride, 0);
     m_state->setDouble(PageAgentState::pageAgentDeviceScaleFactorOverride, 1);
+    m_state->setBoolean(PageAgentState::pageAgentEmulateViewport, false);
     m_state->setBoolean(PageAgentState::pageAgentFitWindow, false);
     m_state->setDouble(PageAgentState::textAutosizingFontScaleFactorOverride, 1);
     m_state->setBoolean(PageAgentState::pageAgentTextAutosizingOverride, false);
@@ -633,7 +636,7 @@ void InspectorPageAgent::setDocumentContent(ErrorString* errorString, const Stri
     DOMPatchSupport::patchDocument(*document, html);
 }
 
-void InspectorPageAgent::setDeviceMetricsOverride(ErrorString* errorString, int width, int height, double deviceScaleFactor, bool fitWindow, const bool* optionalTextAutosizing, const double* optionalFontScaleFactor)
+void InspectorPageAgent::setDeviceMetricsOverride(ErrorString* errorString, int width, int height, double deviceScaleFactor, bool emulateViewport, bool fitWindow, const bool* optionalTextAutosizing, const double* optionalFontScaleFactor)
 {
     const static long maxDimension = 10000000;
 
@@ -660,7 +663,7 @@ void InspectorPageAgent::setDeviceMetricsOverride(ErrorString* errorString, int
         return;
     }
 
-    if (!deviceMetricsChanged(width, height, deviceScaleFactor, fitWindow, fontScaleFactor, textAutosizing))
+    if (!deviceMetricsChanged(width, height, deviceScaleFactor, emulateViewport, fitWindow, fontScaleFactor, textAutosizing))
         return;
 
     Settings& settings = m_page->settings();
@@ -673,24 +676,26 @@ void InspectorPageAgent::setDeviceMetricsOverride(ErrorString* errorString, int
     m_state->setLong(PageAgentState::pageAgentScreenWidthOverride, width);
     m_state->setLong(PageAgentState::pageAgentScreenHeightOverride, height);
     m_state->setDouble(PageAgentState::pageAgentDeviceScaleFactorOverride, deviceScaleFactor);
+    m_state->setBoolean(PageAgentState::pageAgentEmulateViewport, emulateViewport);
     m_state->setBoolean(PageAgentState::pageAgentFitWindow, fitWindow);
     m_state->setDouble(PageAgentState::textAutosizingFontScaleFactorOverride, fontScaleFactor);
     m_state->setBoolean(PageAgentState::pageAgentTextAutosizingOverride, textAutosizing);
 
-    updateViewMetrics(width, height, deviceScaleFactor, fitWindow);
+    updateViewMetrics(width, height, deviceScaleFactor, emulateViewport, fitWindow);
 }
 
-bool InspectorPageAgent::deviceMetricsChanged(int width, int height, double deviceScaleFactor, bool fitWindow, double fontScaleFactor, bool textAutosizing)
+bool InspectorPageAgent::deviceMetricsChanged(int width, int height, double deviceScaleFactor, bool emulateViewport, bool fitWindow, double fontScaleFactor, bool textAutosizing)
 {
     // These two always fit an int.
     int currentWidth = static_cast<int>(m_state->getLong(PageAgentState::pageAgentScreenWidthOverride));
     int currentHeight = static_cast<int>(m_state->getLong(PageAgentState::pageAgentScreenHeightOverride));
     double currentDeviceScaleFactor = m_state->getDouble(PageAgentState::pageAgentDeviceScaleFactorOverride, 1);
+    bool currentEmulateViewport = m_state->getBoolean(PageAgentState::pageAgentEmulateViewport);
     bool currentFitWindow = m_state->getBoolean(PageAgentState::pageAgentFitWindow);
     double currentFontScaleFactor = m_state->getDouble(PageAgentState::textAutosizingFontScaleFactorOverride, 1);
     bool currentTextAutosizing = m_state->getBoolean(PageAgentState::pageAgentTextAutosizingOverride);
 
-    return width != currentWidth || height != currentHeight || deviceScaleFactor != currentDeviceScaleFactor || fitWindow != currentFitWindow || fontScaleFactor != currentFontScaleFactor || textAutosizing != currentTextAutosizing;
+    return width != currentWidth || height != currentHeight || deviceScaleFactor != currentDeviceScaleFactor || emulateViewport != currentEmulateViewport || fitWindow != currentFitWindow || fontScaleFactor != currentFontScaleFactor || textAutosizing != currentTextAutosizing;
 }
 
 void InspectorPageAgent::setShowPaintRects(ErrorString*, bool show)
@@ -711,16 +716,14 @@ void InspectorPageAgent::setShowDebugBorders(ErrorString*, bool show)
 void InspectorPageAgent::setShowFPSCounter(ErrorString*, bool show)
 {
     // FIXME: allow metrics override, fps counter and continuous painting at the same time: crbug.com/299837.
-    bool viewMetricsOverride = m_state->getLong(PageAgentState::pageAgentScreenWidthOverride);
     m_state->setBoolean(PageAgentState::pageAgentShowFPSCounter, show);
-    m_client->setShowFPSCounter(show && !viewMetricsOverride);
+    m_client->setShowFPSCounter(show && !m_deviceMetricsOverridden);
 }
 
 void InspectorPageAgent::setContinuousPaintingEnabled(ErrorString*, bool enabled)
 {
-    bool viewMetricsOverride = m_state->getLong(PageAgentState::pageAgentScreenWidthOverride);
     m_state->setBoolean(PageAgentState::pageAgentContinuousPaintingEnabled, enabled);
-    m_client->setContinuousPaintingEnabled(enabled && !viewMetricsOverride);
+    m_client->setContinuousPaintingEnabled(enabled && !m_deviceMetricsOverridden);
 }
 
 void InspectorPageAgent::setShowScrollBottleneckRects(ErrorString*, bool show)
@@ -917,7 +920,7 @@ String InspectorPageAgent::resourceSourceMapURL(const String& url)
 
 bool InspectorPageAgent::deviceMetricsOverrideEnabled()
 {
-    return m_enabled && m_state->getLong(PageAgentState::pageAgentScreenWidthOverride);
+    return m_enabled && m_deviceMetricsOverridden;
 }
 
 // static
@@ -1070,9 +1073,9 @@ PassRefPtr<TypeBuilder::Page::FrameResourceTree> InspectorPageAgent::buildObject
     return result;
 }
 
-void InspectorPageAgent::updateViewMetrics(int width, int height, double deviceScaleFactor, bool fitWindow)
+void InspectorPageAgent::updateViewMetrics(int width, int height, double deviceScaleFactor, bool emulateViewport, bool fitWindow)
 {
-    m_client->overrideDeviceMetrics(width, height, static_cast<float>(deviceScaleFactor), fitWindow);
+    m_client->overrideDeviceMetrics(width, height, static_cast<float>(deviceScaleFactor), emulateViewport, fitWindow);
 
     Document* document = mainFrame()->document();
     if (document)