Adding option in SkPicture to record device-space bounds of draw commands.

src/core/SkPictureRecord.h

Index: src/core/SkPictureRecord.h
===================================================================
--- src/core/SkPictureRecord.h	(revision 8010)
+++ src/core/SkPictureRecord.h	(working copy)
@@ -102,6 +102,7 @@
     void beginRecording();
     void endRecording();
 
+    static bool canRecordBounds(DrawType op);
 private:
     void recordRestoreOffsetPlaceholder(SkRegion::Op);
     void fillRestoreOffsetPlaceholdersForCurrentStackLevel(
@@ -110,8 +111,9 @@
     SkTDArray<int32_t> fRestoreOffsetStack;
     int fFirstSavedLayerIndex;
     enum {
-        kNoSavedLayerIndex = -1
+        kNoSavedLayerIndex = -1,
     };
+    static const uint32_t kInvalidOffset = ~0;
 
     /*
      * Write the 'drawType' operation and chunk size to the skp. 'size'
@@ -133,10 +135,8 @@
     #ifdef SK_DEBUG_TRACE
         SkDebugf("add %s\n", DrawTypeToString(drawType));
     #endif
-
         SkASSERT(0 != *size);
         SkASSERT(((uint8_t) drawType) == drawType);
-
         if (0 != (*size & ~MASK_24) || *size == MASK_24) {
             fWriter.writeInt(PACK_8_24(drawType, MASK_24));
             *size += 1;
@@ -144,10 +144,14 @@
         } else {
             fWriter.writeInt(PACK_8_24(drawType, *size));
         }
-
+        fLastDrawRejected = false;
         return offset;
     }
 
+    uint32_t addDrawWithBounds(DrawType drawType, uint32_t* size, const SkPaint* paint,
+                               const SkRect* localBounds);
+    bool recordBounds() const { return fRecordFlags & SkPicture::kRecordBounds_RecordingFlag; }
+
     void addInt(int value) {
         fWriter.writeInt(value);
     }
@@ -219,6 +223,7 @@
 
     // Allocated in the constructor and managed by this class.
     SkBitmapHeap* fBitmapHeap;
+    bool fLastDrawRejected;
 
 private:
     SkChunkFlatController fFlattenableHeap;