Clean up CQuartz2D.

- Remove unused methods.
- Rename remaining method names to follow Google C++ style.
- Fix lint errors.

Change-Id: I7179086526c2b7d11ddc0d4c25f5c0b161158a68
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/55719
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

core/fxge/apple/apple_int.h

diff --git a/core/fxge/apple/apple_int.h b/core/fxge/apple/apple_int.h
index 5869421..c58e75c 100644
--- a/core/fxge/apple/apple_int.h
+++ b/core/fxge/apple/apple_int.h
@@ -19,21 +19,19 @@
 
 class CQuartz2D {
  public:
-  void* createGraphics(const RetainPtr<CFX_DIBitmap>& bitmap);
-  void destroyGraphics(void* graphics);
+  void* CreateGraphics(const RetainPtr<CFX_DIBitmap>& bitmap);
+  void DestroyGraphics(void* graphics);
 
   void* CreateFont(const uint8_t* pFontData, uint32_t dwFontSize);
   void DestroyFont(void* pFont);
   void SetGraphicsTextMatrix(void* graphics, const CFX_Matrix& matrix);
-  bool drawGraphicsString(void* graphics,
+  bool DrawGraphicsString(void* graphics,
                           void* font,
                           float fontSize,
                           uint16_t* glyphIndices,
                           CGPoint* glyphPositions,
                           int32_t chars,
                           FX_ARGB argb);
-  void saveGraphicsState(void* graphics);
-  void restoreGraphicsState(void* graphics);
 };
 
 class CApplePlatform : public CFX_GEModule::PlatformIface {

core/fxge/apple/fx_apple_platform.cpp

diff --git a/core/fxge/apple/fx_apple_platform.cpp b/core/fxge/apple/fx_apple_platform.cpp
index b3a0214..7b253a6 100644
--- a/core/fxge/apple/fx_apple_platform.cpp
+++ b/core/fxge/apple/fx_apple_platform.cpp
@@ -77,7 +77,7 @@
     new_matrix.d = -new_matrix.d;
   }
   quartz2d.SetGraphicsTextMatrix(pContext, new_matrix);
-  return quartz2d.drawGraphicsString(pContext, pFont->GetPlatformFont(),
+  return quartz2d.DrawGraphicsString(pContext, pFont->GetPlatformFont(),
                                      font_size, glyph_indices.data(),
                                      glyph_positions.data(), nChars, argb);
 }
@@ -88,7 +88,7 @@
   CQuartz2D& quartz2d =
       static_cast<CApplePlatform*>(CFX_GEModule::Get()->GetPlatform())
           ->m_quartz2d;
-  m_pPlatformGraphics = quartz2d.createGraphics(m_pBitmap);
+  m_pPlatformGraphics = quartz2d.CreateGraphics(m_pBitmap);
 }
 
 void CFX_AggDeviceDriver::DestroyPlatform() {
@@ -96,7 +96,7 @@
       static_cast<CApplePlatform*>(CFX_GEModule::Get()->GetPlatform())
           ->m_quartz2d;
   if (m_pPlatformGraphics) {
-    quartz2d.destroyGraphics(m_pPlatformGraphics);
+    quartz2d.DestroyGraphics(m_pPlatformGraphics);
     m_pPlatformGraphics = nullptr;
   }
 }

core/fxge/apple/fx_quartz_device.cpp

diff --git a/core/fxge/apple/fx_quartz_device.cpp b/core/fxge/apple/fx_quartz_device.cpp
index 6a8d6bd..2281ba5 100644
--- a/core/fxge/apple/fx_quartz_device.cpp
+++ b/core/fxge/apple/fx_quartz_device.cpp
@@ -21,7 +21,7 @@
 #error Expected CGFLOAT_IS_DOUBLE to be defined by CoreGraphics headers
 #endif
 
-void* CQuartz2D::createGraphics(const RetainPtr<CFX_DIBitmap>& pBitmap) {
+void* CQuartz2D::CreateGraphics(const RetainPtr<CFX_DIBitmap>& pBitmap) {
   if (!pBitmap)
     return nullptr;
   CGBitmapInfo bmpInfo = kCGBitmapByteOrder32Little;
@@ -41,7 +41,7 @@
   return context;
 }
 
-void CQuartz2D::destroyGraphics(void* graphics) {
+void CQuartz2D::DestroyGraphics(void* graphics) {
   if (graphics)
     CGContextRelease((CGContextRef)graphics);
 }
@@ -72,7 +72,7 @@
                                      matrix.e, ty));
 }
 
-bool CQuartz2D::drawGraphicsString(void* graphics,
+bool CQuartz2D::DrawGraphicsString(void* graphics,
                                    void* font,
                                    float fontSize,
                                    uint16_t* glyphIndices,
@@ -100,9 +100,10 @@
     glyphPositionsCG[index].y = glyphPositions[index].y;
   }
 #else
-  CGPoint* glyphPositionsCG = (CGPoint*)glyphPositions;
+  CGPoint* glyphPositionsCG = glyphPositions;
 #endif
-  CGContextShowGlyphsAtPositions(context, (CGGlyph*)glyphIndices,
+  CGContextShowGlyphsAtPositions(context,
+                                 reinterpret_cast<CGGlyph*>(glyphIndices),
                                  glyphPositionsCG, charsCount);
 #if CGFLOAT_IS_DOUBLE
   delete[] glyphPositionsCG;
@@ -110,13 +111,3 @@
   CGContextRestoreGState(context);
   return true;
 }
-
-void CQuartz2D::saveGraphicsState(void* graphics) {
-  if (graphics)
-    CGContextSaveGState((CGContextRef)graphics);
-}
-
-void CQuartz2D::restoreGraphicsState(void* graphics) {
-  if (graphics)
-    CGContextRestoreGState((CGContextRef)graphics);
-}