Simplify GraphicsContext::couldUseLCDRenderedText()

After https://codereview.chromium.org/719253002, Skia disables LCD text
for non-opaque save-layers automatically.

Also remove a couple of single-use getters.

R=reed@google.com,jbroman@chromium.org,senorblanco@chromium.org

Review URL: https://codereview.chromium.org/724063004

git-svn-id: svn://svn.chromium.org/blink/trunk@185342 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/platform/graphics/GraphicsContext.cpp

@@ -419,19 +419,6 @@ void GraphicsContext::adjustTextRenderMode(SkPaint* paint) const
     paint->setLCDRenderText(couldUseLCDRenderedText());
 }
 
-bool GraphicsContext::couldUseLCDRenderedText() const
-{
-    ASSERT(m_canvas);
-    // Our layers only have a single alpha channel. This means that subpixel
-    // rendered text cannot be composited correctly when the layer is
-    // collapsed. Therefore, subpixel text is contextDisabled when we are drawing
-    // onto a layer.
-    if (contextDisabled() || m_canvas->isDrawingToLayer() || !isCertainlyOpaque())
-        return false;
-
-    return shouldSmoothFonts();
-}
-
 void GraphicsContext::setCompositeOperation(CompositeOperator compositeOperation, WebBlendMode blendMode)
 {
     if (contextDisabled())

third_party/WebKit/Source/platform/graphics/GraphicsContext.h

@@ -155,11 +155,10 @@ public:
     // FIXME: the setter is only used once, at construction time; convert to a constructor param,
     // and possibly consolidate with other flags (paintDisabled, isPrinting, ...)
     void setShouldSmoothFonts(bool smoothFonts) { m_shouldSmoothFonts = smoothFonts; }
-    bool shouldSmoothFonts() const { return m_shouldSmoothFonts; }
 
     // Turn off LCD text for the paint if not supported on this context.
     void adjustTextRenderMode(SkPaint*) const;
-    bool couldUseLCDRenderedText() const;
+    bool couldUseLCDRenderedText() const { return m_isCertainlyOpaque && m_shouldSmoothFonts; }
 
     void setTextDrawingMode(TextDrawingModeFlags mode) { mutableState()->setTextDrawingMode(mode); }
     TextDrawingModeFlags textDrawingMode() const { return immutableState()->textDrawingMode(); }
@@ -188,7 +187,6 @@ public:
     // the canvas may have transparency (as is the case when rendering
     // to a canvas object).
     void setCertainlyOpaque(bool isOpaque) { m_isCertainlyOpaque = isOpaque; }
-    bool isCertainlyOpaque() const { return m_isCertainlyOpaque; }
 
     // Returns if the context is a printing context instead of a display
     // context. Bitmap shouldn't be resampled when printing to keep the best