Update from https://crrev.com/309717

base/pickle.h

Index: base/pickle.h
diff --git a/base/pickle.h b/base/pickle.h
index 11cf4841f67903b7bd62cd6bdc4dda5467a4f47c..f2a198e3f2da9e13be0b4e20f1fcf8460133327b 100644
--- a/base/pickle.h
+++ b/base/pickle.h
@@ -26,7 +26,7 @@ class BASE_EXPORT PickleIterator {
   // Methods for reading the payload of the Pickle. To read from the start of
   // the Pickle, create a PickleIterator from a Pickle. If successful, these
   // methods return true. Otherwise, false is returned to indicate that the
-  // result could not be extracted. It is not possible to read from iterator
+  // result could not be extracted. It is not possible to read from the iterator
   // after that.
   bool ReadBool(bool* result) WARN_UNUSED_RESULT;
   bool ReadInt(int* result) WARN_UNUSED_RESULT;
@@ -41,10 +41,21 @@ class BASE_EXPORT PickleIterator {
   bool ReadString(std::string* result) WARN_UNUSED_RESULT;
   bool ReadWString(std::wstring* result) WARN_UNUSED_RESULT;
   bool ReadString16(base::string16* result) WARN_UNUSED_RESULT;
+
+  // A pointer to the data will be placed in |*data|, and the length will be
+  // placed in |*length|. The pointer placed into |*data| points into the
+  // message's buffer so it will be scoped to the lifetime of the message (or
+  // until the message data is mutated). Do not keep the pointer around!
   bool ReadData(const char** data, int* length) WARN_UNUSED_RESULT;
+
+  // A pointer to the data will be placed in |*data|. The caller specifies the
+  // number of bytes to read, and ReadBytes will validate this length. The
+  // pointer placed into |*data| points into the message's buffer so it will be
+  // scoped to the lifetime of the message (or until the message data is
+  // mutated). Do not keep the pointer around!
   bool ReadBytes(const char** data, int length) WARN_UNUSED_RESULT;
 
-  // Safer version of ReadInt() checks for the result not being negative.
+  // A safer version of ReadInt() that checks for the result not being negative.
   // Use it for reading the object sizes.
   bool ReadLength(int* result) WARN_UNUSED_RESULT {
     return ReadInt(result) && *result >= 0;
@@ -57,7 +68,7 @@ class BASE_EXPORT PickleIterator {
   }
 
  private:
-  // Aligns 'i' by rounding it up to the next multiple of 'alignment'
+  // Aligns 'i' by rounding it up to the next multiple of 'alignment'.
   static size_t AlignInt(size_t i, int alignment) {
     return i + (alignment - (i % alignment)) % alignment;
   }
@@ -142,91 +153,11 @@ class BASE_EXPORT Pickle {
   // Returns the data for this Pickle.
   const void* data() const { return header_; }
 
-  // For compatibility, these older style read methods pass through to the
-  // PickleIterator methods.
-  // TODO(jbates) Remove these methods.
-  bool ReadBool(PickleIterator* iter,
-                bool* result) const WARN_UNUSED_RESULT {
-    return iter->ReadBool(result);
-  }
-  bool ReadInt(PickleIterator* iter,
-               int* result) const WARN_UNUSED_RESULT {
-    return iter->ReadInt(result);
-  }
-  bool ReadLong(PickleIterator* iter,
-                long* result) const WARN_UNUSED_RESULT {
-    return iter->ReadLong(result);
-  }
-  bool ReadUInt16(PickleIterator* iter,
-                  uint16* result) const WARN_UNUSED_RESULT {
-    return iter->ReadUInt16(result);
-  }
-  bool ReadUInt32(PickleIterator* iter,
-                  uint32* result) const WARN_UNUSED_RESULT {
-    return iter->ReadUInt32(result);
-  }
-  bool ReadInt64(PickleIterator* iter,
-                 int64* result) const WARN_UNUSED_RESULT {
-    return iter->ReadInt64(result);
-  }
-  bool ReadUInt64(PickleIterator* iter,
-                  uint64* result) const WARN_UNUSED_RESULT {
-    return iter->ReadUInt64(result);
-  }
-  bool ReadSizeT(PickleIterator* iter,
-                 size_t* result) const WARN_UNUSED_RESULT {
-    return iter->ReadSizeT(result);
-  }
-  bool ReadFloat(PickleIterator* iter,
-                 float* result) const WARN_UNUSED_RESULT {
-    return iter->ReadFloat(result);
-  }
-  bool ReadDouble(PickleIterator* iter,
-                  double* result) const WARN_UNUSED_RESULT {
-    return iter->ReadDouble(result);
-  }
-  bool ReadString(PickleIterator* iter,
-                  std::string* result) const WARN_UNUSED_RESULT {
-    return iter->ReadString(result);
-  }
-  bool ReadWString(PickleIterator* iter,
-                   std::wstring* result) const WARN_UNUSED_RESULT {
-    return iter->ReadWString(result);
-  }
-  bool ReadString16(PickleIterator* iter,
-                    base::string16* result) const WARN_UNUSED_RESULT {
-    return iter->ReadString16(result);
-  }
-  // A pointer to the data will be placed in *data, and the length will be
-  // placed in *length. This buffer will be into the message's buffer so will
-  // be scoped to the lifetime of the message (or until the message data is
-  // mutated).
-  bool ReadData(PickleIterator* iter,
-                const char** data,
-                int* length) const WARN_UNUSED_RESULT {
-    return iter->ReadData(data, length);
-  }
-  // A pointer to the data will be placed in *data. The caller specifies the
-  // number of bytes to read, and ReadBytes will validate this length. The
-  // returned buffer will be into the message's buffer so will be scoped to the
-  // lifetime of the message (or until the message data is mutated).
-  bool ReadBytes(PickleIterator* iter,
-                 const char** data,
-                 int length) const WARN_UNUSED_RESULT {
-    return iter->ReadBytes(data, length);
-  }
-
-  // Safer version of ReadInt() checks for the result not being negative.
-  // Use it for reading the object sizes.
-  bool ReadLength(PickleIterator* iter,
-                  int* result) const  WARN_UNUSED_RESULT {
-    return iter->ReadLength(result);
-  }
-
   // Methods for adding to the payload of the Pickle.  These values are
   // appended to the end of the Pickle's payload.  When reading values from a
   // Pickle, it is important to read them in the order in which they were added
   // to the Pickle.
+
   bool WriteBool(bool value) {
     return WriteInt(value ? 1 : 0);
   }