fix warnings on Mac in src/pdf

Fix these class of warnings:
- unused functions
- unused locals
- sign mismatch
- missing function prototypes
- missing newline at end of file
- 64 to 32 bit truncation

The changes prefer to link in dead code in the debug build
with 'if (false)' than to comment it out, but trivial cases
are commented out or sometimes deleted if it appears to be
a copy/paste error.
Review URL: https://codereview.appspot.com/6299047

git-svn-id: http://skia.googlecode.com/svn/trunk@4178 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pdf/SkPDFDocument.cpp b/src/pdf/SkPDFDocument.cpp
index 3b9b686..cb24fba 100644
--- a/src/pdf/SkPDFDocument.cpp
+++ b/src/pdf/SkPDFDocument.cpp
@@ -17,7 +17,7 @@
 
 // Add the resources, starting at firstIndex to the catalog, removing any dupes.
 // A hash table would be really nice here.
-void addResourcesToCatalog(int firstIndex, bool firstPage,
+static void addResourcesToCatalog(int firstIndex, bool firstPage,
                           SkTDArray<SkPDFObject*>* resourceList,
                           SkPDFCatalog* catalog) {
     for (int i = firstIndex; i < resourceList->count(); i++) {
@@ -123,12 +123,14 @@
 
         // Figure out the size of things and inform the catalog of file offsets.
         off_t fileOffset = headerSize();
-        fileOffset += fCatalog->setFileOffset(fDocCatalog.get(), fileOffset);
-        fileOffset += fCatalog->setFileOffset(fPages[0], fileOffset);
-        fileOffset += fPages[0]->getPageSize(fCatalog.get(), fileOffset);
+        fileOffset += fCatalog->setFileOffset(fDocCatalog.get(),
+                (size_t) fileOffset);
+        fileOffset += fCatalog->setFileOffset(fPages[0], (size_t) fileOffset);
+        fileOffset += fPages[0]->getPageSize(fCatalog.get(),
+                (size_t) fileOffset);
         for (int i = 0; i < fSecondPageFirstResourceIndex; i++) {
             fileOffset += fCatalog->setFileOffset(fPageResources[i],
-                                                  fileOffset);
+                                                  (size_t) fileOffset);
         }
         // Add the size of resources of substitute objects used on page 1.
         fileOffset += fCatalog->setSubstituteResourcesOffsets(fileOffset, true);
@@ -138,18 +140,20 @@
         }
 
         for (int i = 0; i < fPageTree.count(); i++) {
-            fileOffset += fCatalog->setFileOffset(fPageTree[i], fileOffset);
+            fileOffset += fCatalog->setFileOffset(fPageTree[i],
+                    (size_t) fileOffset);
         }
 
         for (int i = 1; i < fPages.count(); i++) {
-            fileOffset += fPages[i]->getPageSize(fCatalog.get(), fileOffset);
+            fileOffset += fPages[i]->getPageSize(fCatalog.get(),
+                    (size_t) fileOffset);
         }
 
         for (int i = fSecondPageFirstResourceIndex;
                  i < fPageResources.count();
                  i++) {
             fileOffset += fCatalog->setFileOffset(fPageResources[i],
-                                                  fileOffset);
+                                                  (size_t) fileOffset);
         }
 
         fileOffset += fCatalog->setSubstituteResourcesOffsets(fileOffset,