Move Pickle to base namespace.

base/metrics/histogram.h

Index: base/metrics/histogram.h
diff --git a/base/metrics/histogram.h b/base/metrics/histogram.h
index 9ee172e6cdadcf8e1493cffb24e3d5f45ca65be3..c13f05e17904ce7461ffcb7106ef1cac8f3bbfd2 100644
--- a/base/metrics/histogram.h
+++ b/base/metrics/histogram.h
@@ -83,15 +83,14 @@
 #include "base/metrics/histogram_samples.h"
 #include "base/time/time.h"
 
-class Pickle;
-class PickleIterator;
-
 namespace base {
 
 class BooleanHistogram;
 class CustomHistogram;
 class Histogram;
 class LinearHistogram;
+class Pickle;
+class PickleIterator;
 class SampleVector;
 
 class BASE_EXPORT Histogram : public HistogramBase {
@@ -170,7 +169,7 @@ class BASE_EXPORT Histogram : public HistogramBase {
   void Add(Sample value) override;
   scoped_ptr<HistogramSamples> SnapshotSamples() const override;
   void AddSamples(const HistogramSamples& samples) override;
-  bool AddSamplesFromPickle(PickleIterator* iter) override;
+  bool AddSamplesFromPickle(base::PickleIterator* iter) override;
   void WriteHTMLGraph(std::string* output) const override;
   void WriteAscii(std::string* output) const override;
 
@@ -185,7 +184,7 @@ class BASE_EXPORT Histogram : public HistogramBase {
   ~Histogram() override;
 
   // HistogramBase implementation:
-  bool SerializeInfoImpl(Pickle* pickle) const override;
+  bool SerializeInfoImpl(base::Pickle* pickle) const override;
 
   // Method to override to skip the display of the i'th bucket if it's empty.
   virtual bool PrintEmptyBucket(size_t index) const;
@@ -210,8 +209,8 @@ class BASE_EXPORT Histogram : public HistogramBase {
   friend class StatisticsRecorderTest;
 
   friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
-      PickleIterator* iter);
-  static HistogramBase* DeserializeInfoImpl(PickleIterator* iter);
+      base::PickleIterator* iter);
+  static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
   // Implementation of SnapshotSamples function.
   scoped_ptr<SampleVector> SnapshotSampleVector() const;
@@ -321,8 +320,8 @@ class BASE_EXPORT LinearHistogram : public Histogram {
 
  private:
   friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
-      PickleIterator* iter);
-  static HistogramBase* DeserializeInfoImpl(PickleIterator* iter);
+      base::PickleIterator* iter);
+  static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
   // For some ranges, we store a printable description of a bucket range.
   // If there is no description, then GetAsciiBucketRange() uses parent class
@@ -346,8 +345,8 @@ class BASE_EXPORT BooleanHistogram : public LinearHistogram {
   BooleanHistogram(const std::string& name, const BucketRanges* ranges);
 
   friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
-      PickleIterator* iter);
-  static HistogramBase* DeserializeInfoImpl(PickleIterator* iter);
+      base::PickleIterator* iter);
+  static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
   DISALLOW_COPY_AND_ASSIGN(BooleanHistogram);
 };
@@ -381,14 +380,14 @@ class BASE_EXPORT CustomHistogram : public Histogram {
                   const BucketRanges* ranges);
 
   // HistogramBase implementation:
-  bool SerializeInfoImpl(Pickle* pickle) const override;
+  bool SerializeInfoImpl(base::Pickle* pickle) const override;
 
   double GetBucketSize(Count current, size_t i) const override;
 
  private:
   friend BASE_EXPORT_PRIVATE HistogramBase* DeserializeHistogramInfo(
-      PickleIterator* iter);
-  static HistogramBase* DeserializeInfoImpl(PickleIterator* iter);
+      base::PickleIterator* iter);
+  static HistogramBase* DeserializeInfoImpl(base::PickleIterator* iter);
 
   static bool ValidateCustomRanges(const std::vector<Sample>& custom_ranges);
   static BucketRanges* CreateBucketRangesFromCustomRanges(