Remove mirror:: and ArtMethod deps in utils.{h,cc}

The latest chapter in the ongoing saga of attempting to dump a DEX
file without having to start a whole runtime instance.  This episode
finds us removing references to ArtMethod/ArtField/mirror.

One aspect of this change that I would like to call out specfically
is that the utils versions of the "Pretty*" functions all were written
to accept nullptr as an argument.  I have split these functions up as
follows:
1) an instance method, such as PrettyClass that obviously requires
this != nullptr.
2) a static method, that behaves the same way as the util method, but
calls the instance method if p != nullptr.
This requires using a full class qualifier for the static methods,
which isn't exactly beautiful.  I have tried to remove as many cases
as possible where it was clear p != nullptr.

Bug: 22322814
Test: test-art-host
Change-Id: I21adee3614aa697aa580cd1b86b72d9206e1cb24
diff --git a/compiler/dex/dex_to_dex_compiler.cc b/compiler/dex/dex_to_dex_compiler.cc
index 236a3b2..9c1d72b 100644
--- a/compiler/dex/dex_to_dex_compiler.cc
+++ b/compiler/dex/dex_to_dex_compiler.cc
@@ -212,7 +212,7 @@
   VLOG(compiler) << "Replacing " << Instruction::Name(inst->Opcode())
                  << " by " << Instruction::Name(Instruction::RETURN_VOID_NO_BARRIER)
                  << " at dex pc " << StringPrintf("0x%x", dex_pc) << " in method "
-                 << PrettyMethod(unit_.GetDexMethodIndex(), GetDexFile(), true);
+                 << GetDexFile().PrettyMethod(unit_.GetDexMethodIndex(), true);
   inst->SetOpcode(Instruction::RETURN_VOID_NO_BARRIER);
 }
 
@@ -232,7 +232,7 @@
   VLOG(compiler) << "Removing " << Instruction::Name(inst->Opcode())
                  << " by replacing it with 2 NOPs at dex pc "
                  << StringPrintf("0x%x", dex_pc) << " in method "
-                 << PrettyMethod(unit_.GetDexMethodIndex(), GetDexFile(), true);
+                 << GetDexFile().PrettyMethod(unit_.GetDexMethodIndex(), true);
   // We are modifying 4 consecutive bytes.
   inst->SetOpcode(Instruction::NOP);
   inst->SetVRegA_10x(0u);  // keep compliant with verifier.
@@ -262,7 +262,7 @@
                    << " by replacing field index " << field_idx
                    << " by field offset " << field_offset.Int32Value()
                    << " at dex pc " << StringPrintf("0x%x", dex_pc) << " in method "
-                   << PrettyMethod(unit_.GetDexMethodIndex(), GetDexFile(), true);
+                   << GetDexFile().PrettyMethod(unit_.GetDexMethodIndex(), true);
     // We are modifying 4 consecutive bytes.
     inst->SetOpcode(new_opcode);
     // Replace field index by field offset.
@@ -300,12 +300,12 @@
   uint32_t vtable_idx = resolved_method->GetMethodIndex();
   DCHECK(IsUint<16>(vtable_idx));
   VLOG(compiler) << "Quickening " << Instruction::Name(inst->Opcode())
-                 << "(" << PrettyMethod(method_idx, GetDexFile(), true) << ")"
+                 << "(" << GetDexFile().PrettyMethod(method_idx, true) << ")"
                  << " to " << Instruction::Name(new_opcode)
                  << " by replacing method index " << method_idx
                  << " by vtable index " << vtable_idx
                  << " at dex pc " << StringPrintf("0x%x", dex_pc) << " in method "
-                 << PrettyMethod(unit_.GetDexMethodIndex(), GetDexFile(), true);
+                 << GetDexFile().PrettyMethod(unit_.GetDexMethodIndex(), true);
   // We are modifying 4 consecutive bytes.
   inst->SetOpcode(new_opcode);
   // Replace method index by vtable index.