Media Galleries API - Picasa: Change PMP Parsing to deal with PlatformFile.

chrome/browser/media_galleries/fileapi/picasa/pmp_column_reader.h

Index: chrome/browser/media_galleries/fileapi/picasa/pmp_column_reader.h
diff --git a/chrome/browser/media_galleries/fileapi/picasa/pmp_column_reader.h b/chrome/browser/media_galleries/fileapi/picasa/pmp_column_reader.h
index 19ec1d5b5832d4db6800911930f487792eebdec6..a7920f85abde86d72b918b385a420e39e0431086 100644
--- a/chrome/browser/media_galleries/fileapi/picasa/pmp_column_reader.h
+++ b/chrome/browser/media_galleries/fileapi/picasa/pmp_column_reader.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/platform_file.h"
 #include "chrome/browser/media_galleries/fileapi/picasa/pmp_constants.h"
 
 namespace base {
@@ -26,20 +27,23 @@ class PmpColumnReader {
 
   // Returns true if read successfully.
   // |rows_read| is undefined if returns false.
-  bool Init(const base::FilePath& filepath, const PmpFieldType expected_type,
-            uint32* rows_read);
+  bool ReadFile(const base::PlatformFile& file,
+                const PmpFieldType expected_type);
 
   // These functions read the value of that |row| into |result|.
   // Functions return false if the column is of the wrong type or the row
-  // is out of range.
+  // is out of range. May only be called after successful ReadColumn.
   bool ReadString(const uint32 row, std::string* result) const;
   bool ReadUInt32(const uint32 row, uint32* result) const;
   bool ReadDouble64(const uint32 row, double* result) const;
   bool ReadUInt8(const uint32 row, uint8* result) const;
   bool ReadUInt64(const uint32 row, uint64* result) const;
 
+  // May only be called after successful ReadColumn.
+  uint32 rows_read() const;
+
  private:
-  bool ParseData(const PmpFieldType expected_type, uint32* rows_read);
+  bool ParseData(const PmpFieldType expected_type);
   // Returns the number of bytes parsed in the body, or, -1 on failure.
   int64 IndexStrings();
 
@@ -49,7 +53,7 @@ class PmpColumnReader {
 
   // Header data
   PmpFieldType field_type_;
-  uint32 rows_;
+  uint32 rows_read_;
 
   // Index of string start locations if fields are strings. Empty otherwise.
   std::vector<const char*> strings_;