gfx: Make conversions from Size to SizeF be explicit.

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 71c79e468548e13d8387fc2611a1514812758316..a980433c313b2e60f5d5d6d7929cc2bc7646e4b5 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -854,7 +854,7 @@ skia::RefPtr<SkImage> GLRenderer::ApplyBackgroundFilters(
     ScopedResource* background_texture) {
   DCHECK(ShouldApplyBackgroundFilters(quad));
   skia::RefPtr<SkImageFilter> filter = RenderSurfaceFilters::BuildImageFilter(
-      quad->background_filters, background_texture->size());
+      quad->background_filters, gfx::SizeF(background_texture->size()));
 
   skia::RefPtr<SkImage> background_with_filters = ApplyImageFilter(
       ScopedUseGrContext::Create(this, frame), resource_provider_, quad->rect,
@@ -970,7 +970,7 @@ void GLRenderer::DrawRenderPassQuad(DrawingFrame* frame,
   bool use_color_matrix = false;
   if (!quad->filters.IsEmpty()) {
     skia::RefPtr<SkImageFilter> filter = RenderSurfaceFilters::BuildImageFilter(
-        quad->filters, contents_texture->size());
+        quad->filters, gfx::SizeF(contents_texture->size()));
     if (filter) {
       skia::RefPtr<SkColorFilter> cf;
 
@@ -1598,7 +1598,7 @@ void GLRenderer::DrawSolidColorQuad(const DrawingFrame* frame,
     // quad_rect.
     gfx::RectF centered_rect(
         gfx::PointF(-0.5f * tile_rect.width(), -0.5f * tile_rect.height()),
-        tile_rect.size());
+        gfx::SizeF(tile_rect.size()));
     DrawQuadGeometry(frame, quad->shared_quad_state->quad_to_target_transform,
                      centered_rect, uniforms.matrix_location);
   } else {
@@ -1797,7 +1797,7 @@ void GLRenderer::DrawContentQuadAA(const DrawingFrame* frame,
   // it. This is why this centered rect is used and not the original quad_rect.
   gfx::RectF centered_rect(
       gfx::PointF(-0.5f * tile_rect.width(), -0.5f * tile_rect.height()),
-      tile_rect.size());
+      gfx::SizeF(tile_rect.size()));
   DrawQuadGeometry(frame, quad->shared_quad_state->quad_to_target_transform,
                    centered_rect, uniforms.matrix_location);
 }