Bug 1073252. Part 4: Flip hasAlpha to isOpaque for consistency. r=mattwoodrow

--HG--
extra : rebase_source : a553b4c36feb555b23cbe140a05df09f0dc2656d

gfx/layers/basic/MacIOSurfaceTextureHostBasic.cpp

@@ -41,7 +41,7 @@ MacIOSurfaceTextureHostBasic::MacIOSurfaceTextureHostBasic(
 {
   mSurface = MacIOSurface::LookupSurface(aDescriptor.surface(),
                                          aDescriptor.scaleFactor(),
-                                         aDescriptor.hasAlpha());
+                                         !aDescriptor.isOpaque());
 }
 
 gfx::SourceSurface*

gfx/layers/ipc/LayersSurfaces.ipdlh

@@ -53,7 +53,7 @@ struct SurfaceDescriptorD3D10 {
 struct SurfaceDescriptorMacIOSurface {
   uint32_t surface;
   double scaleFactor;
-  bool hasAlpha;
+  bool isOpaque;
 };
 
 struct SurfaceTextureDescriptor {

gfx/layers/opengl/MacIOSurfaceTextureClientOGL.cpp

@@ -55,7 +55,7 @@ MacIOSurfaceTextureClientOGL::ToSurfaceDescriptor(SurfaceDescriptor& aOutDescrip
   }
   aOutDescriptor = SurfaceDescriptorMacIOSurface(mSurface->GetIOSurfaceID(),
                                                  mSurface->GetContentsScaleFactor(),
-                                                 mSurface->HasAlpha());
+                                                 !mSurface->HasAlpha());
   return true;
 }