Revert of Change clear() to respect the clip

src/pdf/SkPDFDevice.cpp

Index: src/pdf/SkPDFDevice.cpp
diff --git a/src/pdf/SkPDFDevice.cpp b/src/pdf/SkPDFDevice.cpp
index 6592ba0c68477ffc96f4153e58c95a3866bd6a5f..fb8df838eb72644beb5c8b08753f07cb58a5820f 100644
--- a/src/pdf/SkPDFDevice.cpp
+++ b/src/pdf/SkPDFDevice.cpp
@@ -799,6 +799,20 @@
     if (clearFontUsage) {
         fFontGlyphUsage->reset();
     }
+}
+
+void SkPDFDevice::clear(SkColor color) {
+    this->cleanUp(true);
+    this->init();
+
+    SkPaint paint;
+    paint.setColor(color);
+    paint.setStyle(SkPaint::kFill_Style);
+    SkMatrix identity;
+    identity.reset();
+    ScopedContentEntry content(this, &fExistingClipStack, fExistingClipRegion,
+                               identity, paint);
+    internalDrawPaint(paint, content.entry());
 }
 
 void SkPDFDevice::drawPaint(const SkDraw& d, const SkPaint& paint) {